TY 2023 Form 990

(A) Name and title	(B) Average hours per week (list any hours for related organizations below dotted line)	(C) Position (do not check more than one box, unless person is both an officer and a director/trustee)	(E) Reportable compensation from related organizations (W-2/1099-MISC/1099-NEC)
(1) MICHAEL DOWLING...................................................................... Trustee/Pres Northwell	0.0 ................. 50.0	X			0	8,971,932	70,612
(2) DAVID BATTINELLI...................................................................... Trustee/EVP Northwell	0.0 ................. 50.0	X			0	1,736,272	78,569
(3) LAWRENCE SMITH...................................................................... Trustee/EVP Northwell	0.0 ................. 50.0	X			0	1,745,587	57,990
(4) MICHELE CUSACK...................................................................... EVP & CFO	0.0 ................. 50.0		X		0	1,617,951	78,507
(5) KEVIN TRACEY...................................................................... President	50.0 ................. 0.0	X	X		1,567,128	0	78,569
(6) LAURENCE KRAEMER...................................................................... EVP, General Counsel & Asst Se	0.0 ................. 50.0		X		0	1,302,865	69,888
(7) ANDREW YACHT...................................................................... Trustee/SVP Northwell	0.0 ................. 50.0	X			0	1,241,819	78,507
(8) BRIAN LALLY...................................................................... SVP, Chief Development Officer	0.0 ................. 50.0		X		0	1,008,232	64,637
(9) RALPH NAPPI...................................................................... Chairman Emeritus	0.0 ................. 50.0		X		0	972,189	64,637
(10) PING WANG...................................................................... SVP/Chief Scientific Officer	50.0 ................. 0.0		X		932,626	0	50,769
(11) CHAD BOUTON...................................................................... VP, Advanced Engineering	50.0 ................. 0.0			X	622,087	0	78,507
(12) YOUSEF AL ABED...................................................................... VP, Molecular Targets	50.0 ................. 0.0			X	593,893	0	78,507
(13) CHRISTINA BRENNAN...................................................................... SVP, Clinical Research	50.0 ................. 0.0			X	630,156	0	36,900
(14) BETTY DIAMOND...................................................................... Center Head/Autoimmune Disease	50.0 ................. 0.0			X	604,579	0	50,790
(15) CATHERINE ALFANO...................................................................... VP, Cancer Care Mgmt & Rsch	50.0 ................. 0.0			X	605,374	0	36,900
(16) BARBARA HRBEK ZUCKER...................................................................... Chairwoman Emeritus	0.0 ................. 2.0	X	X		0	0	0
(17) LEWIS RANIERI...................................................................... Co-Chairman	0.0 ................. 3.0	X	X		0	0	0

(A) Name and business address	(B) Description of services	(C) Compensation
GE PRECISION HEALTHCARE LLC, 3000 N GRANDVIEW BLVD WAUKESHA,WI53188	Equipment Services	379,862
JAMES J DOLAN, 3 Malcolms Landing NORTHPORT,NY11768	CONSULTING FEES	242,623
MJ ROSSANO LLC, 347 W 57th STE 5E NEW YORK,NY10019	CONSULTING FEES	230,725
PHILIPS MEDICAL SYSTEMS, 22100 BOTHELL EVERETT HWY BOTHELL,WA98041	Service Contract	224,471
DEVELOPMENTAL STUDIES HYBRIDOMA BAN, 028 BBE 210 E IOWA AVE IOWA CITY,IA522421324	Research Study	205,686
2 Total number of independent contractors (including but not limited to those listed above) who received more than $100,000 of compensation from the organization 8

- TIN:

SCHEDULE A
(Form 990)

Department of the Treasury
Internal Revenue Service

Public Charity Status and Public Support

Complete if the organization is a section 501(c)(3) organization or a section 4947(a)(1) nonexempt charitable trust.
right arrow

Attach to Form 990 or Form 990-EZ.
right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2023

Open to Public
Inspection

Name of the organization

THE FEINSTEIN INSTITUTES FOR
MEDICAL RESEARCH

Employer identification number

11-2673595

Part I

Reason for Public Charity Status (All organizations must complete this part.) See instructions.

The organization is not a private foundation because it is: (For lines 1 through 12, check only one box.)

A church, convention of churches, or association of churches described in section 170(b)(1)(A)(i).

A school described in section 170(b)(1)(A)(ii). (Attach Schedule E (Form 990).)

A hospital or a cooperative hospital service organization described in section 170(b)(1)(A)(iii).

A medical research organization operated in conjunction with a hospital described in section 170(b)(1)(A)(iii). Enter the hospital's name, city, and state:

NORTH SHORE UNIVERSITY HOSPITAL

MANHASSET

LONG ISLAND JEWISH MEDICAL CENTER

NEW HYDE PARK

LENOX HILL HOSPITAL

NEW YORK

An organization operated for the benefit of a college or university owned or operated by a governmental unit described in section 170(b)(1)(A)(iv). (Complete Part II.)

A federal, state, or local government or governmental unit described in section 170(b)(1)(A)(v).

An organization that normally receives a substantial part of its support from a governmental unit or from the general public described in section 170(b)(1)(A)(vi). (Complete Part II.)

A community trust described in section 170(b)(1)(A)(vi). (Complete Part II.)

An agricultural research organization described in 170(b)(1)(A)(ix) operated in conjunction with a land-grant college or university or a non-land grant college of agriculture. See instructions. Enter the name, city, and state of the college or university:

An organization that normally receives: (1) more than 33 1/3% of its support from contributions, membership fees, and gross receipts from activities related to its exempt functions—subject to certain exceptions, and (2) no more than 33 1/3% of its support from gross investment income and unrelated business taxable income (less section 511 tax) from businesses acquired by the organization after June 30, 1975. See section 509(a)(2). (Complete Part III.)

An organization organized and operated exclusively to test for public safety. See section 509(a)(4).

An organization organized and operated exclusively for the benefit of, to perform the functions of, or to carry out the purposes of one or more publicly supported organizations described in section 509(a)(1) or section 509(a)(2). See section 509(a)(3). Check the box on lines 12a through 12d that describes the type of supporting organization and complete lines 12e, 12f, and 12g.

Type I. A supporting organization operated, supervised, or controlled by its supported organization(s), typically by giving the supported organization(s) the power to regularly appoint or elect a majority of the directors or trustees of the supporting organization. You must complete Part IV, Sections A and B.

Type II. A supporting organization supervised or controlled in connection with its supported organization(s), by having control or management of the supporting organization vested in the same persons that control or manage the supported organization(s). You must complete Part IV, Sections A and C.

Type III functionally integrated. A supporting organization operated in connection with, and functionally integrated with, its supported organization(s) (see instructions). You must complete Part IV, Sections A, D, and E.

Type III non-functionally integrated. A supporting organization operated in connection with its supported organization(s) that is not functionally integrated. The organization generally must satisfy a distribution requirement and an attentiveness requirement (see instructions). You must complete Part IV, Sections A and D, and Part V.

Check this box if the organization received a written determination from the IRS that it is a Type I, Type II, Type III functionally integrated, or Type III non-functionally integrated supporting organization.

Enter the number of supported organizations ...............................

Provide the following information about the supported organization(s).

(i) Name of supported organization	(ii) EIN	(iv) Is the organization listed in your governing document?		(v) Amount of monetary support (see instructions)	(vi) Amount of other support (see instructions)
(i) Name of supported organization	(ii) EIN	Yes	No	(v) Amount of monetary support (see instructions)	(vi) Amount of other support (see instructions)


Total

For Paperwork Reduction Act Notice, see the Instructions for
Form 990 or 990-EZ.

Cat. No. 11285F

Schedule A (Form 990) 2023

Page 2

Part II

Support Schedule for Organizations Described in Sections 170(b)(1)(A)(iv) and 170(b)(1)(A)(vi)
(Complete only if you checked the box on line 5, 7, or 8 of Part I or if the organization failed to qualify under Part III. If the organization failed to qualify under the tests listed below, please complete Part III.)

Section A. Public Support

Calendar year (or fiscal year beginning in)		(a) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
1	Gifts, grants, contributions, and membership fees received. (Do not include any "unusual grant.") ..
2	Tax revenues levied for the organization's benefit and either paid to or expended on its behalf ....
3	The value of services or facilities furnished by a governmental unit to the organization without charge..
4	Total. Add lines 1 through 3
5	The portion of total contributions by each person (other than a governmental unit or publicly supported organization) included on line 1 that exceeds 2% of the amount shown on line 11, column (f) ..
6	Public support. Subtract line 5 from line 4.

Section B. Total Support

Calendar year (or fiscal year beginning in)		(a) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
7	Amounts from line 4..
8	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources...
9	Net income from unrelated business activities, whether or not the business is regularly carried on..
10	Other income. Do not include gain or loss from the sale of capital assets (Explain in Part VI.)..
11	Total support. Add lines 7 through 10

Gross receipts from related activities, etc. (see instructions) ..................

First 5 years. If the Form 990 is for the organization's first, second, third, fourth, or fifth tax year as a section 501(c)(3) organization, check this box and stop here ........................................ right arrow

Section C. Computation of Public Support Percentage

Public support percentage for 2023 (line 6, column (f) divided by line 11, column (f)) .........

Public support percentage for 2022 Schedule A, Part II, line 14 ...............

16a

33 1/3% support test—2023. If the organization did not check the box on line 13, and line 14 is 33 1/3% or more, check this box
and stop here. The organization qualifies as a publicly supported organization ....................... right arrow

33 1/3% support test—2022. If the organization did not check a box on line 13 or 16a, and line 15 is 33 1/3% or more, check this
box and stop here. The organization qualifies as a publicly supported organization ..................... right arrow

17a

10%-facts-and-circumstances test—2023. If the organization did not check a box on line 13, 16a, or 16b, and line 14 is 10% or more, and if the organization meets the "facts-and-circumstances" test, check this box and stop here. Explain in Part VI how the organization meets the "facts-and-circumstances" test. The organization qualifies as a publicly supported organization ............ right arrow

10%-facts-and-circumstances test—2022. If the organization did not check a box on line 13, 16a, 16b, or 17a, and line 15 is 10% or more, and if the organization meets the "facts-and-circumstances" test, check this box and stop here. Explain in Part VI how the organization meets the "facts-and-circumstances" test. The organization qualifies as a publicly supported organization ............ right arrow

Private foundation. If the organization did not check a box on line 13, 16a, 16b, 17a, or 17b, check this box and see
instructions ..................................................... right arrow

Schedule A (Form 990) 2023

Page 3

Part III

Support Schedule for Organizations Described in Section 509(a)(2)
(Complete only if you checked the box on line 10 of Part I or if the organization failed to qualify under Part II. If the organization fails to qualify under the tests listed below, please complete Part II.)

Section A. Public Support

Calendar year (or fiscal year beginning in)		(a) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
1	Gifts, grants, contributions, and membership fees received. (Do not include any "unusual grants.") .
2	Gross receipts from admissions, merchandise sold or services performed, or facilities furnished in any activity that is related to the organization's tax-exempt purpose
3	Gross receipts from activities that are not an unrelated trade or business under section 513 .....
4	Tax revenues levied for the organization's benefit and either paid to or expended on its behalf...
5	The value of services or facilities furnished by a governmental unit to the organization without charge
6	Total. Add lines 1 through 5
7a	Amounts included on lines 1, 2, and 3 received from disqualified persons
b	Amounts included on lines 2 and 3 received from other than disqualified persons that exceed the greater of $5,000 or 1% of the amount on line 13 for the year.
c	Add lines 7a and 7b..
8	Public support. (Subtract line 7c from line 6.)

Section B. Total Support

Calendar year (or fiscal year beginning in)		(a) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
9	Amounts from line 6...
10a	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources..
b	Unrelated business taxable income (less section 511 taxes) from businesses acquired after June 30, 1975.
c	Add lines 10a and 10b.
11	Net income from unrelated business activities not included on line 10b, whether or not the business is regularly carried on.
12	Other income. Do not include gain or loss from the sale of capital assets (Explain in Part VI.) ..
13	Total support. (Add lines 9, 10c, 11, and 12.)..

First 5 years. If the Form 990 is for the organization's first, second, third, fourth, or fifth tax year as a section 501(c)(3) organization, check this box and stop here................................................. right arrow

Section C. Computation of Public Support Percentage

Public support percentage for 2023 (line 8, column (f) divided by line 13, column (f)) .........

Public support percentage from 2022 Schedule A, Part III, line 15 ...............

Section D. Computation of Investment Income Percentage

Investment income percentage for 2023 (line 10c, column (f) divided by line 13, column (f)) ......

Investment income percentage from 2022 Schedule A, Part III, line 17 .............

19a

33 1/3% support tests-2023. If the organization did not check the box on line 14, and line 15 is more than 33 1/3%, and line 17 is not more than 33 1/3%, check this box and stop here. The organization qualifies as a publicly supported organization ....... right arrow

33 1/3 % support tests—2022. If the organization did not check a box on line 14 or line 19a, and line 16 is more than 33 1/3% and line 18 is not more than 33 1/3%, check this box and stop here. The organization qualifies as a publicly supported organization ..... right arrow

Private foundation. If the organization did not check a box on line 14, 19a, or 19b, check this box and see instructions .... right arrow

Schedule A (Form 990) 2023

Page 4

Part IV

Supporting Organizations

(Complete only if you checked a box on line 12 of Part I. If you checked box 12a, of Part I, complete Sections A and B. If you checked box 12b, of Part I, complete Sections A and C. If you checked box 12c, of Part I, complete Sections A, D, and E. If you checked box12d, of Part I, complete Sections A and D, and complete Part V.)

Section A. All Supporting Organizations

Yes

Are all of the organization’s supported organizations listed by name in the organization’s governing documents?
If "No," describe in Part VI how the supported organizations are designated. If designated by class or purpose,
describe the designation. If historic and continuing relationship, explain.

Did the organization have any supported organization that does not have an IRS determination of status under section 509(a)(1) or (2)? If "Yes," explain in Part VI how the organization determined that the supported organization was described in section 509(a)(1) or (2).

Did the organization have a supported organization described in section 501(c)(4), (5), or (6)? If "Yes," answer lines 3b and 3c below.

Did the organization confirm that each supported organization qualified under section 501(c)(4), (5), or (6) and satisfied the public support tests under section 509(a)(2)? If "Yes," describe in Part VI when and how the organization made the determination.

Did the organization ensure that all support to such organizations was used exclusively for section 170(c)(2)(B) purposes? If "Yes," explain in Part VI what controls the organization put in place to ensure such use.

Was any supported organization not organized in the United States ("foreign supported organization")? If “Yes” and if you checked box 12a or 12b in Part I, answer lines 4b and 4c below.

Did the organization have ultimate control and discretion in deciding whether to make grants to the foreign supported organization? If “Yes,” describe in Part VI how the organization had such control and discretion despite being controlled or supervised by or in connection with its supported organizations.

Did the organization support any foreign supported organization that does not have an IRS determination under sections 501(c)(3) and 509(a)(1) or (2)? If “Yes,” explain in Part VI what controls the organization used to ensure that all support to the foreign supported organization was used exclusively for section 170(c)(2)(B) purposes.

Did the organization add, substitute, or remove any supported organizations during the tax year? If “Yes,” answer lines 5b and 5c below (if applicable). Also, provide detail in Part VI, including (i) the names and EIN numbers of the supported organizations added, substituted, or removed; (ii) the reasons for each such action; (iii) the authority under the organization's organizing document authorizing such action; and (iv) how the action was accomplished (such as by amendment to the organizing document).

Type I or Type II only. Was any added or substituted supported organization part of a class already designated in the organization's organizing document?

Substitutions only. Was the substitution the result of an event beyond the organization's control?

Did the organization provide support (whether in the form of grants or the provision of services or facilities) to anyone other than (i) its supported organizations, (ii) individuals that are part of the charitable class benefited by one or more of its supported organizations, or (iii) other supporting organizations that also support or benefit one or more of the filing organization’s supported organizations? If “Yes,” provide detail in Part VI.

Did the organization provide a grant, loan, compensation, or other similar payment to a substantial contributor (defined in section 4958(c)(3)(C)), a family member of a substantial contributor, or a 35% controlled entity with regard to a substantial contributor? If “Yes,” complete Part I of Schedule L (Form 990) .

Did the organization make a loan to a disqualified person (as defined in section 4958) not described on line 7? If “Yes,” complete Part I of Schedule L (Form 990).

Was the organization controlled directly or indirectly at any time during the tax year by one or more disqualified persons, as defined in section 4946 (other than foundation managers and organizations described in section 509(a)(1) or (2))? If “Yes,” provide detail in Part VI.

Did one or more disqualified persons (as defined on line 9a) hold a controlling interest in any entity in which the supporting organization had an interest? If “Yes,” provide detail in Part VI.

Did a disqualified person (as defined on line 9a) have an ownership interest in, or derive any personal benefit from, assets in which the supporting organization also had an interest? If “Yes,” provide detail in Part VI.

10a

Was the organization subject to the excess business holdings rules of section 4943 because of section 4943(f) (regarding certain Type II supporting organizations, and all Type III non-functionally integrated supporting organizations)? If “Yes,” answer line 10b below.

10a

Did the organization have any excess business holdings in the tax year? (Use Schedule C, Form 4720, to determine whether the organization had excess business holdings).

10b

Schedule A (Form 990) 2023

Page 5

Part IV

Supporting Organizations (continued)

Yes

Has the organization accepted a gift or contribution from any of the following persons?

A person who directly or indirectly controls, either alone or together with persons described on lines 11b and 11c below, the governing body of a supported organization?

11a

A family member of a person described on 11a above?

11b

A 35% controlled entity of a person described on line 11a or 11b above? If “Yes” to 11a, 11b, or 11c, provide detail in Part VI.

11c

Section B. Type I Supporting Organizations

Yes

Did the officers, directors, trustees, or membership of one or more supported organizations have the power to regularly appoint or elect at least a majority of the organization’s directors or trustees at all times during the tax year? If “No,” describe in Part VI how the supported organization(s) effectively operated, supervised, or controlled the organization’s activities. If the organization had more than one supported organization, describe how the powers to appoint and/or remove directors or trustees were allocated among the supported organizations and what conditions or restrictions, if any, applied to such powers during the tax year.

Did the organization operate for the benefit of any supported organization other than the supported organization(s) that operated, supervised, or controlled the supporting organization? If “Yes,” explain in Part VI how providing such benefit carried out the purposes of the supported organization(s) that operated, supervised or controlled the supporting organization.

Section C. Type II Supporting Organizations

Yes

Were a majority of the organization’s directors or trustees during the tax year also a majority of the directors or trustees of each of the organization’s supported organization(s)? If “No,” describe in Part VI how control or management of the supporting organization was vested in the same persons that controlled or managed the supported organization(s).

Section D. All Type III Supporting Organizations

Yes

Did the organization provide to each of its supported organizations, by the last day of the fifth month of the organization’s tax year, (i) a written notice describing the type and amount of support provided during the prior tax year, (ii) a copy of the Form 990 that was most recently filed as of the date of notification, and (iii) copies of the organization’s governing documents in effect on the date of notification, to the extent not previously provided?

Were any of the organization’s officers, directors, or trustees either (i) appointed or elected by the supported organization(s) or (ii) serving on the governing body of a supported organization? If "No," explain in Part VI how the organization maintained a close and continuous working relationship with the supported organization(s).

By reason of the relationship described in line 2 above, did the organization’s supported organizations have a significant voice in the organization’s investment policies and in directing the use of the organization’s income or assets at all times during the tax year? If "Yes," describe in Part VI the role the organization’s supported organizations played in this regard.

Section E. Type III Functionally-Integrated Supporting Organizations

Check the box next to the method that the organization used to satisfy the Integral Part Test during the year (see instructions):

The organization satisfied the Activities Test. Complete line 2 below.

The organization is the parent of each of its supported organizations. Complete line 3 below.

The organization supported a governmental entity. Describe in Part VI how you supported a government entity (see instructions)

Activities Test. Answer lines 2a and 2b below.

Yes

Did substantially all of the organization’s activities during the tax year directly further the exempt purposes of the supported organization(s) to which the organization was responsive? If "Yes," then in Part VI identify those supported organizations and explain how these activities directly furthered their exempt purposes, how the organization was responsive to those supported organizations, and how the organization determined that these activities constituted substantially all of its activities.

Did the activities described on line 2a, above constitute activities that, but for the organization’s involvement, one or more of the organization’s supported organization(s) would have been engaged in? If "Yes," explain in Part VI the reasons for the organization’s position that its supported organization(s) would have engaged in these activities but for the organization’s involvement.

Parent of Supported Organizations. Answer lines 3a and 3b below.

Did the organization have the power to regularly appoint or elect a majority of the officers, directors, or trustees of each of the supported organizations?If "Yes" or "No", provide details in Part VI.

Did the organization exercise a substantial degree of direction over the policies, programs and activities of each of its supported organizations? If "Yes," describe in Part VI. the role played by the organization in this regard.

Schedule A (Form 990) 2023

Page 6

Part V

Type III Non-Functionally Integrated 509(a)(3) Supporting Organizations

Check here if the organization satisfied the Integral Part Test as a qualifying trust on Nov. 20, 1970 (explain in Part VI). See instructions. All other Type III non-functionally integrated supporting organizations must complete Sections A through E.

	Section A - Adjusted Net Income		(A) Prior Year	(B) Current Year (optional)
1	Net short-term capital gain	1
2	Recoveries of prior-year distributions	2
3	Other gross income (see instructions)	3
4	Add lines 1 through 3	4
5	Depreciation and depletion	5
6	Portion of operating expenses paid or incurred for production or collection of gross income or for management, conservation, or maintenance of property held for production of income (see instructions)	6
7	Other expenses (see instructions)	7
8	Adjusted Net Income (subtract lines 5, 6 and 7 from line 4)	8

	Section B - Minimum Asset Amount		(A) Prior Year	(B) Current Year (optional)
1	Aggregate fair market value of all non-exempt-use assets (see instructions for short tax year or assets held for part of year):	1
a	Average monthly value of securities	1a
b	Average monthly cash balances	1b
c	Fair market value of other non-exempt-use assets	1c
d	Total (add lines 1a, 1b, and 1c)	1d
e	Discount claimed for blockage or other factors (explain in detail in Part VI):
2	Acquisition indebtedness applicable to non-exempt use assets	2
3	Subtract line 2 from line 1d	3
4	Cash deemed held for exempt use. Enter 0.015 of line 3 (for greater amount, see instructions).	4
5	Net value of non-exempt-use assets (subtract line 4 from line 3)	5
6	Multiply line 5 by 0.035	6
7	Recoveries of prior-year distributions	7
8	Minimum Asset Amount (add line 7 to line 6)	8

	Section C - Distributable Amount		Current Year
1	Adjusted net income for prior year (from Section A, line 8, Column A)	1
2	Enter 85% of line 1	2
3	Minimum asset amount for prior year (from Section B, line 8, Column A)	3
4	Enter greater of line 2 or line 3	4
5	Income tax imposed in prior year	5
6	Distributable Amount. Subtract line 5 from line 4, unless subject to emergency temporary reduction (see instructions)	6

Check here if the current year is the organization's first as a non-functionally-integrated Type III supporting organization (see instructions)

Schedule A (Form 990) 2023

Page 7

Part V

Type III Non-Functionally Integrated 509(a)(3) Supporting Organizations(continued)

Section D - Distributions		Current Year
1 Amounts paid to supported organizations to accomplish exempt purposes	1
2 Amounts paid to perform activity that directly furthers exempt purposes of supported organizations, in excess of income from activity	2
3 Administrative expenses paid to accomplish exempt purposes of supported organizations	3
4 Amounts paid to acquire exempt-use assets	4
5 Qualified set-aside amounts (prior IRS approval required - provide details in Part VI)	5
6 Other distributions (describe in Part VI). See instructions	6
7Total annual distributions. Add lines 1 through 6.	7
8 Distributions to attentive supported organizations to which the organization is responsive (provide details in Part VI). See instructions	8
9 Distributable amount for 2023 from Section C, line 6	9
10 Line 8 amount divided by Line 9 amount	10

Section E - Distribution Allocations (see instructions)		(i) Excess Distributions	(ii) Underdistributions Pre-2023	(iii) Distributable Amount for 2023
1 Distributable amount for 2023 from Section C, line 6
2 Underdistributions, if any, for years prior to 2023 (reasonable cause required-- explain in Part VI). See instructions.
3 Excess distributions carryover, if any, to 2023:
a From 2018.......
b From 2019.......
c From 2020.......
d From 2021.......
e From 2022.......
fTotal of lines 3a through e
g Applied to underdistributions of prior years
h Applied to 2023 distributable amount
i Carryover from 2018 not applied (see instructions)
j Remainder. Subtract lines 3g, 3h, and 3i from line 3f.
4Distributions for 2023 from Section D, line 7:
$
a Applied to underdistributions of prior years
b Applied to 2023 distributable amount
c Remainder. Subtract lines 4a and 4b from line 4.
5 Remaining underdistributions for years prior to 2023, if any. Subtract lines 3g and 4a from line 2. If the amount is greater than zero, explain in Part VI. See instructions.
6 Remaining underdistributions for 2023. Subtract lines 3h and 4b from line 1. If the amount is greater than zero, explain in Part VI. See instructions.
7 Excess distributions carryover to 2024. Add lines 3j and 4c.
8 Breakdown of line 7:
a Excess from 2019.....
b Excess from 2020.....
c Excess from 2021.....
d Excess from 2022.....
e Excess from 2023.....

Schedule A (Form 990) (2023)

Schedule A (Form 990) 2023

Page 8

Part VI

Supplemental Information. Provide the explanations required by Part II, line 10; Part II, line 17a or 17b; Part III, line 12; Part IV, Section A, lines 1, 2, 3b, 3c, 4b, 4c, 5a, 6, 9a, 9b, 9c, 11a, 11b, and 11c; Part IV, Section B, lines 1 and 2; Part IV, Section C, line 1; Part IV, Section D, lines 2 and 3; Part IV, Section E, lines 1c, 2a, 2b, 3a and 3b; Part V, line 1; Part V, Section B, line 1e; Part V Section D, lines 5, 6, and 8; and Part V, Section E, lines 2, 5, and 6. Also complete this part for any additional information. (See instructions).

Facts And Circumstances Test

Return Reference	Explanation

Schedule A (Form 990) 2023

Additional Data

Software ID:
Software Version:

- TIN:

Schedule B
(Form 990)

Department of the Treasury
Internal Revenue Service

Schedule of Contributors

Attach to Form 990, 990-EZ, or 990-PF.

Go to www.irs.gov/Form990 for the latest information.

OMB No. 1545-0047

2023

Name of the organization

THE FEINSTEIN INSTITUTES FOR
MEDICAL RESEARCH

Employer identification number

11-2673595

Organization type (check one):

Filers of:

Section:

Form 990 or 990-EZ

501(c)( ) (enter number) organization

4947(a)(1) nonexempt charitable trust not treated as a private foundation

527 political organization

Form 990-PF

501(c)(3) exempt private foundation

4947(a)(1) nonexempt charitable trust treated as a private foundation

501(c)(3) taxable private foundation

Check if your organization is covered by the General Rule or a Special Rule.
Note: Only a section 501(c)(7), (8), or (10) organization can check boxes for both the General Rule and a Special Rule. See instructions.

General Rule

For an organization filing Form 990, 990-EZ, or 990-PF that received, during the year, contributions totaling $5,000 or more (in money or other property) from any one contributor. Complete Parts I and II. See instructions for determining a contributor's total contributions.

Special Rules

For an organization described in section 501(c)(3) filing Form 990 or 990-EZ that met the 33¹/3% support test of the regulations
under sections 509(a)(1) and 170(b)(1)(A)(vi), that checked Schedule A (Form 990 or 990-EZ), Part II, line 13, 16a, or 16b, and that received from any one contributor, during the year, total contributions of the greater of (1) $5,000 or (2) 2% of the amount on (i) Form 990, Part VIII, line 1h, or (ii) Form 990-EZ, line 1. Complete Parts I and II.

For an organization described in section 501(c)(7), (8), or (10) filing Form 990 or 990-EZ that received from any one contributor,
during the year, total contributions of more than $1,000 exclusively for religious, charitable, scientific, literary, or educational purposes, or for the prevention of cruelty to children or animals. Complete Parts I, II, and III.

For an organization described in section 501(c)(7), (8), or (10) filing Form 990 or 990-EZ that received from any one contributor,
during the year, contributions exclusively for religious, charitable, etc., purposes, but no such contributions totaled more than $1,000. If this box is checked, enter here the total contributions that were received during the year for an exclusively religious, charitable, etc., purpose. Don't complete any of the parts unless the General Rule applies to this organization because it received nonexclusively religious, charitable, etc., contributions totaling $5,000 or more during the year ......... Arrow Bullet

Caution: An organization that isn't covered by the General Rule and/or the Special Rules doesn't file Schedule B (Form 990,
990-EZ, or 990-PF), but it must answer “No” on Part IV, line 2, of its Form 990; or check the box on line H of its Form 990-EZ
or on its Form 990PF, Part I, line 2, to certify that it doesn't meet the filing requirements of Schedule B (Form 990,
990-EZ, or 990-PF).

For Paperwork Reduction Act Notice, see the Instructions
for Form 990, 990-EZ, or 990-PF.

Cat. No. 30613XSchedule B (Form 990) (2023)

Schedule B (Form 990) (2023) Page 2

Name of organization THE FEINSTEIN INSTITUTES FOR MEDICAL RESEARCH

Part I Contributors	Contributors (see instructions). Use duplicate copies of Part I if additional space is needed.
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
RESTRICTED	,	$ RESTRICTED	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
Schedule B (Form 990) (2023)

Schedule B (Form 990) (2023)

Page 3

Name of organization THE FEINSTEIN INSTITUTES FOR MEDICAL RESEARCH		Employer identification number 11-2673595

Part II	Noncash Property (see instructions). Use duplicate copies of Part II if additional space is needed.
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
Schedule B (Form 990) (2023)

Schedule B (Form 990) (2023)

Page 4


Name of organization THE FEINSTEIN INSTITUTES FOR MEDICAL RESEARCH			Employer identification number 11-2673595
Part III Exclusively religious, charitable, etc., contributions to organizations described in section 501(c)(7), (8), or (10) that total more than $1,000 for the year from any one contributor. Complete columns (a) through (e) and the following line entry. For organizations completing Part III, enter the total of exclusively religious, charitable, etc., contributions of $1,000 or less for the year. (Enter this information once. See instructions.) $ Use duplicate copies of Part III if additional space is needed.

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

Schedule B (Form 990) (2023)

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE D
(Form 990)

Department of the Treasury
Internal Revenue Service

Supplemental Financial Statements

Complete if the organization answered "Yes," on Form 990,
Part IV, line 6, 7, 8, 9, 10, 11a, 11b, 11c, 11d, 11e, 11f, 12a, or 12b.
right arrow

Attach to Form 990.
right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2022

Open to Public Inspection

Name of the organization

THE FEINSTEIN INSTITUTES FOR
MEDICAL RESEARCH

Employer identification number

11-2673595

Part I

Organizations Maintaining Donor Advised Funds or Other Similar Funds or Accounts. Complete if the organization answered "Yes" on Form 990, Part IV, line 6.

		(a) Donor advised funds	(b) Funds and other accounts
1	Total number at end of year .........
2	Aggregate value of contributions to (during year)
3	Aggregate value of grants from (during year)
4	Aggregate value at end of year ........

Did the organization inform all donors and donor advisors in writing that the assets held in donor advised funds are the organization’s property, subject to the organization’s exclusive legal control? ............

Yes No

Did the organization inform all grantees, donors, and donor advisors in writing that grant funds can be used only for charitable purposes and not for the benefit of the donor or donor advisor, or for any other purpose conferring impermissible private benefit? ...................................

Yes No

Part II

Conservation Easements.
Complete if the organization answered "Yes" on Form 990, Part IV, line 7.

Purpose(s) of conservation easements held by the organization (check all that apply).

Preservation of land for public use (e.g., recreation or education) Preservation of an historically important land area

Protection of natural habitat Preservation of a certified historic structure

Preservation of open space

Complete lines 2a through 2d if the organization held a qualified conservation contribution in the form of a conservation easement on the last day of the tax year.


a	Total number of conservation easements ......................	2a
b	Total acreage restricted by conservation easements ....................	2b
c	Number of conservation easements on a certified historic structure included in (a) .....	2c
d	Number of conservation easements included in (c) acquired after July 25, 2006, and not on a historic structure listed in the National Register ...	2d

Number of conservation easements modified, transferred, released, extinguished, or terminated by the organization during the
tax year right arrow

Number of states where property subject to conservation easement is located right arrow

Does the organization have a written policy regarding the periodic monitoring, inspection, handling of violations, and enforcement of the conservation easements it holds? ............

Yes No

Staff and volunteer hours devoted to monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow

Amount of expenses incurred in monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow

Does each conservation easement reported on line 2(d) above satisfy the requirements of section 170(h)(4)(B)(i) and section 170(h)(4)(B)(ii)? .............................

Yes No

In Part XIII, describe how the organization reports conservation easements in its revenue and expense statement, and
balance sheet, and include, if applicable, the text of the footnote to the organization’s financial statements that describes
the organization’s accounting for conservation easements.

Part III

Organizations Maintaining Collections of Art, Historical Treasures, or Other Similar Assets.
Complete if the organization answered "Yes" on Form 990, Part IV, line 8.

If the organization elected, as permitted under FASB ASC 958, not to report in its revenue statement and balance sheet works of art, historical treasures, or other similar assets held for public exhibition, education, or research in furtherance of public service, provide, in Part XIII, the text of the footnote to its financial statements that describes these items.

If the organization elected, as permitted under FASB ASC 958, to report in its revenue statement and balance sheet works of art, historical treasures, or other similar assets held for public exhibition, education, or research in furtherance of public service, provide the following amounts relating to these items:

(i)

Revenue included on Form 990, Part VIII, line 1 ......................... right arrow

(ii)

Assets included in Form 990, Part X ............................... right arrow

If the organization received or held works of art, historical treasures, or other similar assets for financial gain, provide the
following amounts required to be reported under FASB ASC 958 relating to these items:

Revenue included on Form 990, Part VIII, line 1 .......................... right arrow

Assets included in Form 990, Part X ............................... right arrow

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 52283D

Schedule D (Form 990) 2022

Page 2

Part III

Organizations Maintaining Collections of Art, Historical Treasures, or Other Similar Assets (continued)

Using the organization’s acquisition, accession, and other records, check any of the following that are a significant use of its collection items (check all that apply):

Public exhibition

Loan or exchange programs

Scholarly research

Other

Preservation for future generations

Provide a description of the organization’s collections and explain how they further the organization’s exempt purpose in
Part XIII.

During the year, did the organization solicit or receive donations of art, historical treasures or other similar
assets to be sold to raise funds rather than to be maintained as part of the organization’s collection?...

Yes No

Part IV

Escrow and Custodial Arrangements. Complete if the organization answered "Yes" on Form 990, Part IV, line 9, or reported an amount on Form 990, Part X, line 21.

Is the organization an agent, trustee, custodian or other intermediary for contributions or other assets not
included on Form 990, Part X? ....................................

Yes No


b	If "Yes," explain the arrangement in Part XIII and complete the following table:		Amount
c	Beginning balance .............................	1c
d	Additions during the year ............................	1d
e	Distributions during the year ..........................	1e
f	Ending balance ................................	1f

Did the organization include an amount on Form 990, Part X, line 21, for escrow or custodial account liability? ...

Yes No

If "Yes," explain the arrangement in Part XIII. Check here if the explanation has been provided in Part XIII ....

Part V

Endowment Funds.
Complete if the organization answered "Yes" on Form 990, Part IV, line 10.

		(a) Current year	(b) Prior year	(c) Two years back	(d) Three years back	(e) Four years back

1a	Beginning of year balance ....	45,601,785	39,414,450	34,662,250	29,269,430	23,628,988
b	Contributions ...
c	Net investment earnings, gains, and losses	-10,870,392	9,837,335	8,003,158	7,991,278	8,001,891
d	Grants or scholarships ...
e	Other expenditures for facilities and programs ...	3,382,083	3,650,000	3,250,958	2,598,458	2,361,449
f	Administrative expenses ....
g	End of year balance ......	31,349,310	45,601,785	39,414,450	34,662,250	29,269,430

Provide the estimated percentage of the current year end balance (line 1g, column (a)) held as:

Board designated or quasi-endowment right arrow

Permanent endowment right arrow

100.000 %

Term endowment right arrow

The percentages on lines 2a, 2b, and 2c should equal 100%.

Are there endowment funds not in the possession of the organization that are held and administered for the
organization by:

Yes

(i) Unrelated organizations .................

3a(i)

(ii) Related organizations .................

3a(ii)

If "Yes" on 3a(ii), are the related organizations listed as required on Schedule R? .........

Describe in Part XIII the intended uses of the organization's endowment funds.

Part VI

Land, Buildings, and Equipment.
Complete if the organization answered "Yes" on Form 990, Part IV, line 11a. See Form 990, Part X, line 10.

Description of property		(a) Cost or other basis (investment)	(b) Cost or other basis (other)	(c) Accumulated depreciation	(d) Book value

1a	Land .....	553,003		553,003
b	Buildings ....	70,114,077	29,924,516	40,189,561
c	Leasehold improvements
d	Equipment ....	43,647,904	16,612,821	27,035,083
e	Other .....	1,243,768	904,306	339,462
Total. Add lines 1a through 1e. (Column (d) must equal Form 990, Part X, column (B), line 10(c).)..				68,117,109

Schedule D (Form 990) 2022

Page 3

Part VII

Investments - Other Securities.
Complete if the organization answered "Yes" on Form 990, Part IV, line 11b. See Form 990, Part X, line 12.

(a) Description of security or category (including name of security)	(b) Book value	(c) Method of valuation: Cost or end-of-year market value
(1) Financial derivatives.........
(2) Closely-held equity interests........
(3)Other
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
Total. (Column (b) must equal Form 990, Part X, col. (B) line 12.)

Part VIII

Investments - Program Related. Complete if the organization answered 'Yes' on Form 990, Part IV, line 11c. See Form 990, Part X, line 13.

(a) Description of investment	(b) Book value	(c) Method of valuation: Cost or end-of-year market value

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 13.)

Part IX

Other Assets.
Complete if the organization answered 'Yes' on Form 990, Part IV, line 11d. See Form 990, Part X, line 15.

(a) Description				(b) Book value
(1)INTEREST IN NWH FOUNDATION				82,681,343
(2)INSURANCE CLAIMS RECEIVABLE				151,762
(3)OTHER				301,000
(4)RIGHT OF USE ASSETS				521,576
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 15.)...........				83,655,681

Part X

Other Liabilities.
Complete if the organization answered 'Yes' on Form 990, Part IV, line 11e or 11f. See Form 990, Part X, line 25.

1.(a) Description of liability	(b) Book value
(1) Federal income taxes	0
INSURANCE CLAIMS LIABILITY	151,762
ROYALTY PAYABLE	28,344
OPERATING LEASE OBLIGATION	521,576
DUE TO AFFILIATE	21,737,341





Total. (Column (b) must equal Form 990, Part X, col.(B) line 25.)	22,439,023
2. Liability for uncertain tax positions. In Part XIII, provide the text of the footnote to the organization's financial statements that reports the organization's liability for uncertain tax positions under FIN 48 (ASC 740). Check here if the text of the footnote has been provided in Part XIII

Schedule D (Form 990) 2022

Page 4

Part XI Reconciliation of Revenue per Audited Financial Statements With Revenue per Return. Complete if the organization answered 'Yes' on Form 990, Part IV, line 12a.
1	Total revenue, gains, and other support per audited financial statements .......			1	100,199,287
2	Amounts included on line 1 but not on Form 990, Part VIII, line 12:
a	Net unrealized gains (losses) on investments ....	2a	243,431
b	Donated services and use of facilities .........	2b
c	Recoveries of prior year grants ...........	2c
d	Other (Describe in Part XIII.) ...........	2d	14,641,591
e	Add lines 2a through 2d .....................			2e	14,885,022
3	Subtract line 2e from line 1..................			3	85,314,265
4	Amounts included on Form 990, Part VIII, line 12, but not on line 1:
a	Investment expenses not included on Form 990, Part VIII, line 7b .	4a
b	Other (Describe in Part XIII.) ...........	4b	67,457,982
c	Add lines 4a and 4b....................			4c	67,457,982
5	Total revenue. Add lines 3 and 4c. (This must equal Form 990, Part I, line 12.) ......			5	152,772,247

Part XII Reconciliation of Expenses per Audited Financial Statements With Expenses per Return. Complete if the organization answered 'Yes' on Form 990, Part IV, line 12a.
1	Total expenses and losses per audited financial statements ...........			1	150,852,010
2	Amounts included on line 1 but not on Form 990, Part IX, line 25:
a	Donated services and use of facilities .........	2a
b	Prior year adjustments ............	2b
c	Other losses ................	2c
d	Other (Describe in Part XIII.) ...........	2d	18,892
e	Add lines 2a through 2d....................			2e	18,892
3	Subtract line 2e from line 1...................			3	150,833,118
4	Amounts included on Form 990, Part IX, line 25, but not on line 1:
a	Investment expenses not included on Form 990, Part VIII, line 7b ..	4a
b	Other (Describe in Part XIII.) ...........	4b	50,915
c	Add lines 4a and 4b.....................			4c	50,915
5	Total expenses. Add lines 3 and 4c. (This must equal Form 990, Part I, line 18.) ......			5	150,884,033

Part XIII

Supplemental Information

Provide the descriptions required for Part II, lines 3, 5, and 9; Part III, lines 1a and 4; Part lV, lines 1b and 2b; Part V, line 4; Part X, line 2; Part XI, lines 2d and 4b; and Part XII, lines 2d and 4b. Also complete this part to provide any additional information.

Return Reference	Explanation
PART X, LINE 2 - FIN 48	Certain entities included in Northwell's consolidated financial statements are taxable entities under federal or state laws. GAAP requires that the asset and liability method of accounting for income taxes be utilized by these organizations and for unrelated business activities of the tax-exempt entities included in Northwell's consolidated financial statements. Under the asset and liability method, deferred income taxes are recognized for the tax consequences of temporary differences by applying enacted statutory tax rates applicable to future years to differences between the financial statement carrying amounts and the tax basis of existing assets and liabilities. At December 31, 2023 and 2022, Northwell has net deferred tax assets of approximately $170,000,000 and $158,000,000 respectively, which have been fully offset by a related valuation allowance. The deferred tax asset and related valuation allowance are recorded within other current assets in the accompanying consolidated statements of financial position. A valuation allowance is provided when it is more likely than not that some portion or all of the deferred tax asset will not be realized. Significant components of the deferred tax asset relate to net operating loss (NOL) carryforwards. Certain entities have NOL carryforwards aggregating approximately $573,000,000 at December 31, 2023. NOL carryforwards generated prior to 2018 will expire in varying amounts through 2037 and are available to offset future taxable income of the respective entity. NOLs generated after 2017 can be carried forward indefinitely, but with limitations.
PART XI, LINE 2D & 4B - RECONCILIATION OF REVENUE	RECONCILIATION OF REVENUE NET ASSETS RELEASED FROM RESTRICTION 15,718,225 NON-OPERATING NET PERIODIC BENEFIT COST ( 50,915) NET ASSETS RELEASED FROM OPERATIONS (1,044,611) ALLOCATED RENT EXPENSE 18,892 TOTAL REVENUE ON BOOKS NOT RETURN 14,641,591 REVENUE FROM NSUH-FPP 55,018,385 REVENUE FROM FOUNDATION-RESTRICTED 9,958,220 INTEREST TEMP RESTRICTED FUND 2,958,377 TOTAL REVENUE ON RETURN NOT BOOKS 67,457,982
PART XII, LINE 2D & 4B - RECONCILIATION OF EXPENSES	RECONCILIATION OF EXPENSES ALLOCATED RENT EXPENSE 18,892 TOTAL 18,892 NON-OPERATING NET PERIODIC BENEFIT COST 50,915 TOTAL 50,915
PART V, LINE 4 - INTENDED USE OF ENDOWMENTS	There are various components that encompass the Endowment Fund. In general, their intended use is for teaching, research and training, major modernization, and purchases of equipment.

Schedule D (Form 990) 2022

Additional Data

Software ID:
Software Version:

- TIN:

Schedule J
(Form 990)

Department of the Treasury
Internal Revenue Service

Compensation Information

For certain Officers, Directors, Trustees, Key Employees, and Highest
Compensated Employees
medium right arrow graphic

Complete if the organization answered "Yes" on Form 990, Part IV, line 23.
medium right arrow graphic

Attach to Form 990.
medium right arrow graphic

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2023

Open to Public Inspection

Name of the organization

THE FEINSTEIN INSTITUTES FOR
MEDICAL RESEARCH

Employer identification number

11-2673595

Part I

Questions Regarding Compensation

Yes

Check the appropiate box(es) if the organization provided any of the following to or for a person listed on Form
990, Part VII, Section A, line 1a. Complete Part III to provide any relevant information regarding these items.

First-class or charter travel Housing allowance or residence for personal use

Travel for companions Payments for business use of personal residence

Tax idemnification and gross-up payments Health or social club dues or initiation fees

Discretionary spending account Personal services (e.g., maid, chauffeur, chef)

If any of the boxes on Line 1a are checked, did the organization follow a written policy regarding payment or reimbursement or provision of all of the expenses described above? If "No," complete Part III to explain .....

Did the organization require substantiation prior to reimbursing or allowing expenses incurred by all
directors, trustees, officers, including the CEO/Executive Director, regarding the items checked on Line 1a? ....

Indicate which, if any, of the following the filing organization used to establish the compensation of the
organization's CEO/Executive Director. Check all that apply. Do not check any boxes for methods
used by a related organization to establish compensation of the CEO/Executive Director, but explain in Part III.

Compensation committee Written employment contract

Independent compensation consultant Compensation survey or study

Form 990 of other organizations Approval by the board or compensation committee

During the year, did any person listed on Form 990, Part VII, Section A, line 1a, with respect to the filing organization or a related organization:

Receive a severance payment or change-of-control payment? .............

Participate in, or receive payment from, a supplemental nonqualified retirement plan? .........

Participate in, or receive payment from, an equity-based compensation arrangement? .........

If "Yes" to any of lines 4a-c, list the persons and provide the applicable amounts for each item in Part III.

Only 501(c)(3), 501(c)(4), and 501(c)(29) organizations must complete lines 5-9.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization pay or accrue any
compensation contingent on the revenues of:

The organization? ....................

Any related organization? .......................

If "Yes," on line 5a or 5b, describe in Part III.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization pay or accrue any
compensation contingent on the net earnings of:

The organization? ..................

Any related organization? ......................

If "Yes," on line 6a or 6b, describe in Part III.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization provide any nonfixed
payments not described in lines 5 and 6? If "Yes," describe in Part III ............

Yes

Were any amounts reported on Form 990, Part VII, paid or accured pursuant to a contract that was
subject to the initial contract exception described in Regulations section 53.4958-4(a)(3)? If "Yes," describe
in Part III ..........................

If "Yes" on line 8, did the organization also follow the rebuttable presumption procedure described in Regulations section 53.4958-6(c)? .........................

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 50053T

Schedule J (Form 990) 2023

Page 2

Part II

Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees. Use duplicate copies if additional space is needed.

For each individual whose compensation must be reported on Schedule J, report compensation from the organization on row (i) and from related organizations, described in the
instructions, on row (ii). Do not list any individuals that are not listed on Form 990, Part VII.
Note. The sum of columns (B)(i)-(iii) for each listed individual must equal the total amount of Form 990, Part VII, Section A, line 1a, applicable column (D) and (E) amounts for that individual.

(A) Name and Title		(B) Breakdown of W-2, 1099-MISC compensation, and/or 1099-NEC			(C) Retirement and other deferred compensation	(D) Nontaxable benefits	(E) Total of columns (B)(i)-(D)	(F) Compensation in column (B) reported as deferred on prior Form 990
(A) Name and Title		(i) Base compensation	(ii) Bonus & incentive compensation	(iii) Other reportable compensation	(C) Retirement and other deferred compensation	(D) Nontaxable benefits	(E) Total of columns (B)(i)-(D)
1LAURENCE KRAEMER EVP, General Counsel & Asst Se	(i) (ii)	0 ------------- 1,081,573	0 ------------- 177,892	0 ------------- 43,400	0 ------------- 36,300	0 ------------- 33,588	0 ------------- 1,372,753	0 ------------- 0
2MICHELE CUSACK EVP & CFO	(i) (ii)	0 ------------- 1,305,802	0 ------------- 222,366	0 ------------- 89,783	0 ------------- 36,300	0 ------------- 42,207	0 ------------- 1,696,458	0 ------------- 0
3RALPH NAPPI Chairman Emeritus	(i) (ii)	0 ------------- 788,605	0 ------------- 146,583	0 ------------- 37,001	0 ------------- 36,300	0 ------------- 28,337	0 ------------- 1,036,826	0 ------------- 0
4LAWRENCE SMITH Trustee/EVP Northwell	(i) (ii)	0 ------------- 1,020,931	0 ------------- 682,647	0 ------------- 42,009	0 ------------- 36,300	0 ------------- 21,690	0 ------------- 1,803,577	0 ------------- 0
5DAVID BATTINELLI Trustee/EVP Northwell	(i) (ii)	0 ------------- 1,325,861	0 ------------- 389,436	0 ------------- 20,975	0 ------------- 36,300	0 ------------- 42,269	0 ------------- 1,814,841	0 ------------- 0
6MICHAEL DOWLING Trustee/Pres Northwell	(i) (ii)	0 ------------- 3,962,212	0 ------------- 4,948,761	0 ------------- 60,959	0 ------------- 36,300	0 ------------- 34,312	0 ------------- 9,042,544	0 ------------- 0
7ANDREW YACHT Trustee/SVP Northwell	(i) (ii)	0 ------------- 910,602	0 ------------- 265,440	0 ------------- 65,777	0 ------------- 36,300	0 ------------- 42,207	0 ------------- 1,320,326	0 ------------- 0
8BRIAN LALLY SVP, Chief Development Officer	(i) (ii)	0 ------------- 813,069	0 ------------- 151,209	0 ------------- 43,954	0 ------------- 36,300	0 ------------- 28,337	0 ------------- 1,072,869	0 ------------- 0
9PING WANG SVP/Chief Scientific Officer	(i) (ii)	755,077 ------------- 0	136,088 ------------- 0	41,461 ------------- 0	36,300 ------------- 0	14,469 ------------- 0	983,395 ------------- 0	0 ------------- 0
10KEVIN TRACEY President	(i) (ii)	1,200,161 ------------- 0	320,492 ------------- 0	46,475 ------------- 0	36,300 ------------- 0	42,269 ------------- 0	1,645,697 ------------- 0	0 ------------- 0
11CHRISTINA BRENNAN SVP, Clinical Research	(i) (ii)	508,133 ------------- 0	88,946 ------------- 0	33,077 ------------- 0	36,300 ------------- 0	600 ------------- 0	667,056 ------------- 0	0 ------------- 0
12CHAD BOUTON VP, Advanced Engineering	(i) (ii)	523,510 ------------- 0	57,158 ------------- 0	41,419 ------------- 0	36,300 ------------- 0	42,207 ------------- 0	700,594 ------------- 0	0 ------------- 0
13CATHERINE ALFANO VP, Cancer Care Mgmt & Rsch	(i) (ii)	545,723 ------------- 0	57,438 ------------- 0	2,213 ------------- 0	36,300 ------------- 0	600 ------------- 0	642,274 ------------- 0	0 ------------- 0
14BETTY DIAMOND Center Head/Autoimmune Disease	(i) (ii)	562,042 ------------- 0	5,000 ------------- 0	37,537 ------------- 0	36,300 ------------- 0	14,490 ------------- 0	655,369 ------------- 0	0 ------------- 0
15YOUSEF AL ABED VP, Molecular Targets	(i) (ii)	531,553 ------------- 0	57,103 ------------- 0	5,237 ------------- 0	36,300 ------------- 0	42,207 ------------- 0	672,400 ------------- 0	0 ------------- 0

Schedule J (Form 990) 2023

Page 3

Part III

Supplemental Information

Provide the information, explanation, or descriptions required for Part I, lines 1a, 1b, 3, 4a, 4b, 4c, 5a, 5b, 6a, 6b, 7, and 8, and for Part II. Also complete this part for any additional information.

Return Reference	Explanation
PART I, LINE 7 - BONUS AND INCENTIVE COMPENSATION	On Form 990, Part VII, Section A, line 1A, the organization may provide non-fixed payments, not described on lines 5 and 6, to certain listed persons. The organization bases such payments on many performance based factors. Payments of this type appear on Schedule J, Part II, B (II).

Schedule J (Form 990) 2023

Additional Data

Software ID:
Software Version:

- TIN:

Schedule L
(Form 990)

Department of the Treasury
Internal Revenue Service

Transactions with Interested Persons

Complete if the organization answered "Yes" on Form 990, Part IV, lines 25a, 25b, 26, 27, 28a, 28b, or 28c, or Form 990-EZ, Part V, line 38a or 40b.
Attach to Form 990 or Form 990-EZ.
Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2023

Open to Public Inspection

Name of the organization

THE FEINSTEIN INSTITUTES FOR
MEDICAL RESEARCH

Employer identification number

11-2673595

Part I

Excess Benefit Transactions (section 501(c)(3), section 501(c)(4), and section 501(c)(29) organizations only).
Complete if the organization answered "Yes" on Form 990, Part IV, line 25a or 25b, or Form 990-EZ, Part V, line 40b.

1(a) Name of disqualified person	(c) Description of transaction	(d) Corrected?
1(a) Name of disqualified person	(c) Description of transaction	Yes	No

Enter the amount of tax incurred by the organization managers or disqualified persons during the year under section 4958. ........................... $

Enter the amount of tax, if any, on line 2, above, reimbursed by the organization ........ $

Part II

Loans to and/or From Interested Persons.
Complete if the organization answered "Yes" on Form 990-EZ, Part V, line 38a, or Form 990, Part IV, line 26; or if the organization reported an amount on Form 990, Part X, line 5, 6, or 22

(a) Name of interested person	(b) Relationship with organization	(c) Purpose of loan	(d) Loan to or from the organization?		(e) Original principal amount	(f) Balance due	(g) In default?		(h) Approved by board or committee?		(i) Written agreement?
(a) Name of interested person	(b) Relationship with organization	(c) Purpose of loan	To	From	(e) Original principal amount	(f) Balance due	Yes	No	Yes	No	Yes	No




Total ............... $

Part III

Grants or Assistance Benefiting Interested Persons.
Complete if the organization answered "Yes" on Form 990, Part IV, line 27.

(a) Name of interested person	(b) Relationship between interested person and the organization	(c) Amount of assistance	(d) Type of assistance	(e) Purpose of assistance

For Paperwork Reduction Act Notice, see the Instructions for Form 990 or 990-EZ.

Cat. No. 50056A

Schedule L (Form 990) 2023

Page 2

Part IV

Business Transactions Involving Interested Persons.
Complete if the organization answered "Yes" on Form 990, Part IV, line 28a, 28b, or 28c.

(a) Name of interested person	(b) Relationship between interested person and the organization	(c) Amount of transaction	(d) Description of transaction	(e) Sharing of organization's revenues?
(a) Name of interested person		(c) Amount of transaction	(d) Description of transaction	Yes	No
(1) Suffolk Construction Company Inc	Bus Rel: John Fish	910,269	Business		No

Part V

Supplemental Information
Provide additional information for responses to questions on Schedule L (see instructions).

Return Reference	Explanation

Schedule L (Form 990) 2023

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE O
(Form 990)

Department of the Treasury
Internal Revenue Service

Supplemental Information to Form 990 or 990-EZ

Complete to provide information for responses to specific questions on
Form 990 or 990-EZ or to provide any additional information.
Attach to Form 990 or 990-EZ.
Go to www.irs.gov/Form990 for the latest information.

OMB No. 1545-0047

2023

Open to Public
Inspection

Name of the organization

THE FEINSTEIN INSTITUTES FOR
MEDICAL RESEARCH

Employer identification number

11-2673595

Return Reference	Explanation
PART VI, SECTION A - GOVERNING BODY, LINE 2	All transactions with Northwell Health entities are as follows: (1) negotiated at arm's length; (2) all purchases are at fair market value; and (3) all products or services are rendered on an "as needed" basis. Jeffrey Feinstein has a family relationship with Leaonard Feinstein. Leonard Feinstein has a family relationship with Jeffrey Feinstein. John Fish has a business relationship with Scott Rechler. Edward Forst has a business relationship with Kevin Tracey. Robert Perro has a business relationship with Lewis Ranieri. Lewis Ranieri has a business relationship with Robert Perro. Scott Rechler has a business relationship with John Fish. Kevin Tracey has a business relationship with Edward Forst.
PART VI, SECTION B - POLICIES, LINE 11	The annual Return of Organization Exempt From Income Tax (Form 990) for Northwell Health, Inc. and Affiliated entities are prepared with input from various departments including Corporate Compliance, Finance, Human Resources, and Legal. Before filing the returns, the documents are electronically made available to all trustees through a secure online portal. Members of the Executive Committee are then informed the returns are ready for review. The Executive Committee, which is a committee made up of members from the Board of Trustees, may exercise all of the authority of the Board of Trustees except as such authority is limited by applicable law and except to the extent, if any, that such authority would be inconsistent with any provision of these By-laws or is limited by any resolution to such effect adopted by the Board of Trustees.
PART VI, SECTION B - POLICIES, LINE 12C	Northwell Health, Inc. ("Northwell") has several control mechanisms to mitigate conflicts of interest. Northwell's Code of Ethical Conduct contains a detailed section educating individuals about how to avoid potential conflicts of interest. Specifically, our Code of Ethical Conduct requires individuals to conduct Northwell business in a manner that places the interests of Northwell ahead of their personal interests. In addition, Northwell has a Conflicts of Interest Policy Statement further elaborating upon individuals' disclosure and recusal obligations. Individuals that are in a position to influence the business or other decisions of Northwell are required to fill out a conflicts of interest disclosure form on a regular basis. The Corporate Compliance Office reviews all disclosures of possible conflicts, including matters disclosed in any conflicts of interest disclosure report and takes any actions deemed required or appropriate to manage or resolve any actual or potential conflicts of interest. In appropriate cases these disclosures and responsive actions will be reported to Northwell's Audit and Corporate Compliance Committee and other applicable committees. In addition, Northwell provides training to individuals on an annual basis regarding conflicts of interest and other compliance related topics. If an individual violates the Code of Ethical Conduct or any related policy such as the Conflicts of Interest Policy Statement, appropriate disciplinary action is taken based upon the facts and circumstances of the situation.
PART VI, SECTION B - POLICIES, LINE 15	The by-laws of Northwell Health, Inc. ("Northwell") create a committee of the board with full powers of the board to review and approve the compensation of officers and other key employees. The committee consists of approximately 6 trustees who have no connection to Northwell except as trustees and they have no conflicts as to matters they consider. The committee meets several times a year as needed but always meets in November/December to review and determine officer and key employee compensation for the following year. For purposes of their review the committee considers the recommendations of the CEO for all persons other than the CEO. For purposes of the review each year the committee receives information from an outside independent compensation consultant as to compensation for comparable positions in comparable organizations and makes its decisions on this basis, with the overall objective of paying base salary at the 50th percentile. Any contracts or other compensation for officers or key employees are separately considered and normally only approved after receipt of a "fairness opinion" from the independent consultant. All the work and process of the committee is structured to fall within the applicable safe harbor regulations.
PART VI, SECTION C - DISCLOSURES, LINE 19	CURRENTLY THE ORGANIZATION PROVIDES GOVERNANCE DOCUMENTS, CONFLICT OF INTEREST POLICIES AND FINANCIAL STATEMENTS TO THE PUBLIC UPON REQUEST.
PART VII, SECTION A - LINE 1A, COLUMN (B)	This organization is affiliated with Northwell Health, Inc. ("Northwell"). The Officers, Directors and Trustees listed on Schedule J hold similar positions with both this organization and other affiliates of Northwell, and they do not separately allocate their time to this organization and such other affiliates. The hours shown for all such persons reflect time devoted to Northwell and its affiliates, including this organization. For Directors and Trustees, the hours shown reflect the estimated average weekly time. For officers, Key Employees and Highest Compensated Employees, the hours shown reflect the weekly hours used when determining compensation payments for services rendered and are, generally, less than the actual weekly hours devoted to Northwell and its affiliates.
PART VI, SECTION A - GOVERNING BODY, LINE 7	Northwell Healthcare, Inc. ("Northwell Healthcare") is the sole corporate member of the organization. Northwell Healthcare has the right to elect or appoint member of the organization's governing body and has the right to approve or ratify certain corporate decisions. This organization and Northwell Healthcare are part of Northwell Health, Inc., an integrated health care delivery system.
PART XI, LINE 9 - RECONCILIATION OF NET ASSETS	OTHER 12,231 CHANGE IN EQUITY UNDER FAS 136 4,050,712 AMOUNTS REPORTED SEPARATELY (1,044,611) TOTAL 3,018,332

For Paperwork Reduction Act Notice, see the Instructions for Form 990 or 990-EZ.

Cat. No. 51056K

Schedule O (Form 990) 2023

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE R
(Form 990)

Department of the Treasury
Internal Revenue Service

Related Organizations and Unrelated Partnerships

Complete if the organization answered "Yes" on Form 990, Part IV, line 33, 34, 35b, 36, or 37.
Attach to Form 990.
Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2023

Open to Public Inspection

Name of the organization

THE FEINSTEIN INSTITUTES FOR
MEDICAL RESEARCH

Employer identification number

11-2673595

Part I

Identification of Disregarded Entities. Complete if the organization answered "Yes" on Form 990, Part IV, line 33.

(a) Name, address, and EIN (if applicable) of disregarded entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Total income	(e) End-of-year assets	(f) Direct controlling entity

Part II

Identification of Related Tax-Exempt Organizations. Complete if the organization answered "Yes" on Form 990, Part IV, line 34 because it had one or more related tax-exempt organizations during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Exempt Code section	(e) Public charity status (if section 501(c)(3))	(f) Direct controlling entity	(g) Section 512(b)(13) controlled entity?
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Exempt Code section	(e) Public charity status (if section 501(c)(3))	(f) Direct controlling entity	Yes	No
(1)Black Hall Dental PC 972 Brush Hollow Rd Westbury,NY11590 87-3777395	Inactive	NY	501(C)(3)	Applied For	NSUH		No
(2)Brightwaters Gynecology PC 972 Brush Hollow Rd Westbury,NY11590 82-1883445	Medical Servi	NY	501(C)(3)	10	NSUH		No
(3)Brooklyn Ambulatory Care PC 972 Brush Hollow Rd Westbury,NY11590 47-4447289	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(4)Carnegie Cardiovascular PC 972 Brush Hollow Rd Westbury,NY11590 47-4377825	Medical Servi	NY	501(C)(3)	12, Type I	Lenox Hill		No
(5)Central Suffolk Hospital 1 Heroes Way Riverhead,NY11901 11-1661359	Health Care	NY	501(C)(3)	3	Healthcare		No
(6)CLNY Alliance Inc 972 Brush Hollow Rd Westbury,NY11590 46-3146870	Laboratory	NY	501(C)(3)	3	NA		No
(7)Community Drive Surgery PC 972 Brush Hollow Rd Westbury,NY11590 82-1672429	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(8)Glen Cove Faculty Medical Affiliates Un 972 Brush Hollow Rd Westbury,NY11590 87-2454513	Medical Servi	NY	501(C)(3)	12, Type I	Glen Cove		No
(9)Glen Cove Hospital 972 Brush Hollow Rd Westbury,NY11590 11-1633487	Health Care	NY	501(C)(3)	3	Healthcare		No
(10)Harbor View Medical Services PC 75 North Country Rd Port Jefferson,NY11777 26-4517010	Supporting Or	NY	501(C)(3)	12, Type I	Mather		No
(11)Hillside Hospital Houses Inc 972 Brush Hollow Rd Westbury,NY11590 11-2113949	Housing Comp	NY	501(C)(2)	N/A	Northwell He		No
(12)Hospice Care in Westchester and Putnam 540 White Plains Rd Tarrytown,NY10591 13-3882602	Hospice Care	NY	501(C)(3)	10	VNA Hudson		No
(13)Hospice Care Network 99 Sunnyside Blvd Woodbury,NY11797 11-2925757	Hospice	NY	501(C)(3)	9	Healthcare		No
(14)Huntington Faculty Medical Affiliates U 972 Brush Hollow Rd Westbury,NY11590 85-0642554	Billing	NY	501(C)(3)	12, Type I	Huntington		No
(15)Huntington Hospital Association 270 Park Avenue Huntington,NY11743 11-1630914	Health Care	NY	501(C)(3)	3	Healthcare		No
(16)Huntington Hospital Dolan Family Health 284 Pulaski Rd Greenlawn,NY11740 11-3368503	Health Care	NY	501(C)(3)	3	Huntington		No
(17)John T Mather Memorial Hospital 75 North Country Rd Port Jefferson,NY11777 11-1639818	Health Care	NY	501(C)(3)	3	Healthcare		No
(18)Lakeville Surgery PC 972 Brush Hollow Rd Westbury,NY11590 47-4377760	Medical Servi	NY	501(C)(3)	10	Lenox Hill		No
(19)Lenox Hill Faculty Medical Affiliates U 972 Brush Hollow Rd Westbury,NY11590 85-0656357	Billing	NY	501(C)(3)	12, Type I	Lenox Hill		No
(20)Lenox Hill Hospital 972 Brush Hollow Rd Westbury,NY11590 13-1624070	Health Care	NY	501(C)(3)	3	Healthcare		No
(21)Lenox Hill Hospital Medical PC 972 Brush Hollow Rd Westbury,NY11590 45-2661543	Medical Servi	NY	501(C)(3)	10	NSUH		No
(22)Lenox Hill Pathology PC 972 Brush Hollow Rd Westbury,NY11590 13-3644370	Medical Servi	NY	501(C)(3)	12, Type I	Lenox Hill		No
(23)Lenox Otolaryngology Head & Neck Surgery 972 Brush Hollow Rd Westbury,NY11590 20-8784395	Medical Servi	NY	501(C)(3)	12, Type I	Lenox Hill		No
(24)LHH Corporation 972 Brush Hollow Rd Westbury,NY11590 13-3272016	Supporting Or	NY	501(C)(3)	12, Type I	Northwell He		No
(25)LIJ Foundation 972 Brush Hollow Rd Westbury,NY11590 11-2661239	Supporting Or	NY	501(C)(3)	12, Type I	Northwell He		No
(26)Long Island Jewish Faculty Medical Affil 972 Brush Hollow Rd Westbury,NY11590 85-0667316	Billing	NY	501(C)(3)	12, Type I	LIJMC		No
(27)Long Island Jewish Medical Center 972 Brush Hollow Rd Westbury,NY11590 11-2241326	Health Care	NY	501(C)(3)	3	Healthcare		No
(28)Long Island Jewish Medical Center at Hom 972 Brush Hollow Rd Westbury,NY11590 11-3251128	Supporting Or	NY	501(C)(3)	12, Type I	Northwell He		No
(29)Marcus Ave OB-GYN PC 972 Brush Hollow Rd Westbury,NY11590 88-0775003	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(30)Marcus Avenue Medical PC 972 Brush Hollow Rd Westbury,NY11590 81-0861452	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(31)Mather Faculty Medical Affiliates Unive 972 Brush Hollow Rd Westbury,NY11590 87-2064922	Medical Servi	NY	501(C)(3)	12, Type I	Mather		No
(32)Medical Care of Queens PC 972 Brush Hollow Rd Westbury,NY11590 47-4377679	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(33)Medical Services of Bellmore PC 972 Brush Hollow Rd Westbury,NY11590 87-4277673	Inactive	NY	501(C)(3)	Applied For	NSUH		No
(34)Medical Services of Kips Bay PC 972 Brush Hollow Rd Westbury,NY11590 85-3052457	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(35)Medical Services of Lenox Hill PC 972 Brush Hollow Rd Westbury,NY11590 92-3311309	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(36)Medical Services of Lynbrook PC 972 Brush Hollow Rd Westbury,NY11590 84-4268663	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(37)Medical Services of Manhasset PC 972 Brush Hollow Rd Westbury,NY11590 92-3278147	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(38)Medical Services of Nassau PC 972 Brush Hollow Rd Westbury,NY11590 92-3137107	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(39)Medical Services of Setauket PC 972 Brush Hollow Rd Westbury,NY11590 84-4305970	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(40)Medical Services of South Nassau PC 972 Brush Hollow Rd Westbury,NY11590 92-3251451	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(41)Medical Services of Stony Brook PC 972 Brush Hollow Rd Westbury,NY11590 92-3357143	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(42)Medical Services of Uniondale PC 972 Brush Hollow Rd Westbury,NY11590 84-4279391	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(43)NORCORP Inc 400 East Main Street Mount Kisco,NY10549 13-3366748	Support Org	NY	501(C)(3)	12, Type I	NWHA		No
(44)North Shore Community Services Inc 972 Brush Hollow Rd Westbury,NY11590 23-7273200	Housing Comp	NY	501(C)(2)	N/A	Northwell He		No
(45)North Shore ENT & Allergy Medical Affili 972 Brush Hollow Rd Westbury,NY11590 88-3448425	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(46)North Shore Faculty Medical Affiliates 972 Brush Hollow Rd Westbury,NY11590 85-2887872	Billing	NY	501(C)(3)	12, Type I	NSUH		No
(47)North Shore Health System Medical Facult 972 Brush Hollow Rd Westbury,NY11590 85-3920020	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(48)North Shore University Hospital 972 Brush Hollow Rd Westbury,NY11590 11-1562701	Health Care	NY	501(C)(3)	3	Healthcare		No
(49)North Shore University Hospital at Glen 972 Brush Hollow Rd Westbury,NY11590 23-7010468	Housing Comp	NY	501(C)(2)	N/A	Northwell He		No
(50)North Shore University Hospital Housing 972 Brush Hollow Rd Westbury,NY11590 11-2171903	Housing Comp	NY	501(C)(2)	N/A	Northwell He		No
(51)North Shore-LIJ Anesthesiology PC 972 Brush Hollow Rd Westbury,NY11590 46-1617561	Medical Servi	NY	501(C)(3)	12, Type I	South Shore		No
(52)North Shore-LIJ Cardiology at Deer Park 972 Brush Hollow Rd Westbury,NY11590 27-5078531	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(53)North Shore-LIJ Health Plan Inc 972 Brush Hollow Rd Westbury,NY11590 46-1617516	Insurance	NY	501(C)(3)	9	Health Plan		No
(54)North Shore-LIJ Heart Surgery PC 972 Brush Hollow Rd Westbury,NY11590 27-5078838	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(55)North Shore-LIJ Internal Medicine at Lyn 972 Brush Hollow Rd Westbury,NY11590 46-3475908	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(56)North Shore-LIJ Internal Medicine at New 972 Brush Hollow Rd Westbury,NY11590 46-2822879	Medical Servi	NY	501(C)(3)	10	NSUH		No
(57)North Shore-LIJ Internal Medicine PC 972 Brush Hollow Rd Westbury,NY11590 27-5078631	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(58)North Shore-LIJ Medical Group at Hunting 972 Brush Hollow Rd Westbury,NY11590 27-4384049	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(59)North Shore-LIJ Medical Group at North N 972 Brush Hollow Rd Westbury,NY11590 27-4384146	Medical Servi	NY	501(C)(3)	10	NSUH		No
(60)North Shore-LIJ Medical Group at Syosset 972 Brush Hollow Rd Westbury,NY11590 27-3957752	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(61)North Shore-LIJ Medical Group Urgent Med 972 Brush Hollow Rd Westbury,NY11590 27-5078246	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(62)North Shore-LIJ Medical Group PC 972 Brush Hollow Rd Westbury,NY11590 27-4384249	Medical Servi	NY	501(C)(3)	10	NSUH		No
(63)North Shore-LIJ Medical PC 972 Brush Hollow Rd Westbury,NY11590 45-3023019	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(64)North Shore-LIJ OB-GYN at Garden City P 972 Brush Hollow Rd Westbury,NY11590 46-2886776	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(65)North Shore-LIJ OB-GYN at New Hyde Park 972 Brush Hollow Rd Westbury,NY11590 47-3722278	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(66)North Shore-LIJ OB-GYN PC 972 Brush Hollow Rd Westbury,NY11590 46-1382916	Medical Servi	NY	501(C)(3)	10	NSUH		No
(67)North Shore-LIJ Occupational Medicine PC 972 Brush Hollow Rd Westbury,NY11590 45-1004103	Medical Servi	NY	501(C)(3)	10	NSUH		No
(68)North Shore-LIJ Pediatrics of Suffolk Co 972 Brush Hollow Rd Westbury,NY11590 46-5746956	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(69)North Shore-LIJ Radiology Services PC 972 Brush Hollow Rd Westbury,NY11590 22-3970667	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(70)North Shore-Long Island Jewish Medical C 972 Brush Hollow Rd Westbury,NY11590 11-3473923	Supporting Or	NY	501(C)(3)	12, Type I	Northwell He		No
(71)Northeastern Anesthesia of New Jersey P 972 Brush Hollow Rd Westbury,NY11590 20-8709500	Medical Servi	NJ	501(C)(3)	12, Type I	NSUH		No
(72)Northern Westchester Faculty Medical Aff 972 Brush Hollow Rd Westbury,NY11590 87-2140271	Medical Servi	NY	501(C)(3)	12, Type I	NWHA		No
(73)Northern Westchester Hospital Associatio 400 East Main Street Mount Kisco,NY10549 13-1740118	Health Care	NY	501(C)(3)	3	Healthcare		No
(74)Northern Westchester Hospital Center Fou 400 East Main Street Mount Kisco,NY10549 13-4067064	Foundation	NY	501(C)(3)	9	NWHA		No
(75)Northern Westchester Realty Holding Comp 400 East Main Street Mount Kisco,NY10549 91-2134215	Holding Compa	NY	501(C)(2)	N/A	NWHA		No
(76)Northwell Health Alliance Inc 972 Brush Hollow Rd Westbury,NY11590 26-3727582	Health Care	NY	501(C)(3)	3	NA		No
(77)Northwell Health Cancer Institute Inc 972 Brush Hollow Rd Westbury,NY11590 87-4329881	Inactive	NY	501(C)(3)	Applied For	Healthcare		No
(78)Northwell Health Foundation 972 Brush Hollow Rd Westbury,NY11590 11-2965575	Fundraising	NY	501(C)(3)	7	Northwell He		No
(79)Northwell Health Gastroenterology Instit 972 Brush Hollow Rd Westbury,NY11590 85-2355853	Medical Servi	NY	501(C)(3)	Applied For	Healthcare		No
(80)Northwell Health Laboratories 972 Brush Hollow Rd Westbury,NY11590 11-3412370	Supporting Or	NY	501(C)(3)	12, Type I	Northwell He		No
(81)Northwell Health Medical PC 972 Brush Hollow Rd Westbury,NY11590 88-2104467	Medical Servi	PA	501(C)(3)	Applied For	NSUH		No
(82)Northwell Health Physician Partners Inc 972 Brush Hollow Rd Westbury,NY11590 87-3328924	Inactive	NY	501(C)(3)	Applied For	Healthcare		No
(83)Northwell Health Plans Holding Company 972 Brush Hollow Rd Westbury,NY11590 46-2478147	Holding Compa	NY	501(C)(3)	12, Type II	Healthcare		No
(84)Northwell Health Stern Family Center for 972 Brush Hollow Rd Westbury,NY11590 23-7007485	Nursing Home	NY	501(C)(3)	9	Healthcare		No
(85)Northwell Health Inc 972 Brush Hollow Rd Westbury,NY11590 11-3418133	Supporting Or	NY	501(C)(3)	12, Type I	NA		No
(86)Northwell Healthcare Inc 972 Brush Hollow Rd Westbury,NY11590 11-2965586	Supporting Or	NY	501(C)(3)	12, Type I	Northwell He		No
(87)Northwell Proton Therapy PC 972 Brush Hollow Rd Westbury,NY11590 81-2766298	Medical Servi	NJ	501(C)(3)	10	NSUH		No
(88)Northwell Public Health Corps Inc 972 Brush Hollow Rd Westbury,NY11590 87-4434322	Inactive	NY	501(C)(3)	Applied For	Healthcare		No
(89)Northwell Quality and Medical Affairs I 972 Brush Hollow Rd Westbury,NY11590 82-4113233	Supporting Or	NY	501(C)(3)	12, Type I	Healthcare		No
(90)Nurse Heroes of Northwell Health Foundat 972 Brush Hollow Rd Westbury,NY11590 85-3994359	Fundraising	NY	501(C)(3)	Applied For	Foundation		No
(91)Peconic Bay Faculty Medical Affiliates 972 Brush Hollow Rd Westbury,NY11590 87-1869119	Medical Servi	NY	501(C)(3)	12, Type I	PBMC		No
(92)Peconic Cardiology PC 972 Brush Hollow Rd Westbury,NY11590 81-3149464	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(93)Phelps Faculty Medical Affiliates Unive 972 Brush Hollow Rd Westbury,NY11590 87-3213128	Medical Servi	NY	501(C)(3)	12, Type I	Phelps Memor		No
(94)Phelps Medical Services PC 701 North Broadway Sleepy Hollow,NY10591 27-4416017	Medical Servi	NY	501(C)(3)	12, Type I	Phelps Memor		No
(95)Phelps Memorial Hospital Association 701 North Broadway Sleepy Hollow,NY10591 13-1725076	Health Care	NY	501(C)(3)	3	Healthcare		No
(96)Physicians of University Hospital PC 1 Edgewater Plaza 6th Fl Staten Island,NY10305 20-0096809	Health Care	NY	501(C)(3)	12, Type I	SIUH		No
(97)Plainview Faculty Medical Affiliates Un 972 Brush Hollow Rd Westbury,NY11590 87-2116326	Medical Servi	NY	501(C)(3)	12, Type I	Plainview		No
(98)Plainview Hospital 972 Brush Hollow Rd Westbury,NY11590 11-3241243	Health Care	NY	501(C)(3)	3	Healthcare		No
(99)Sandi and Bill Nicholson - The Women Who 972 Brush Hollow Rd Westbury,NY11590 85-0554966	Fundraising	NY	501(C)(3)	Applied For	NA		No
(100)SIUH Systems Inc 475 Seaview Avenue Staten Island,NY10305 06-1074604	Fundraising	NY	501(C)(3)	7	Healthcare		No
(101)South Shore Faculty Medical Affiliates 972 Brush Hollow Rd Westbury,NY11590 87-1744354	Medical Servi	NY	501(C)(3)	12, Type I	South Shore		No
(102)South Shore University Hospital 972 Brush Hollow Rd Westbury,NY11590 11-1667761	Health Care	NY	501(C)(3)	3	Healthcare		No
(103)Southside Faculty Medical Affiliates Un 972 Brush Hollow Rd Westbury,NY11590 85-3953395	Billing	NY	501(C)(3)	12, Type I	South Shore		No
(104)Sports Physical Therapy Occupational Th 972 Brush Hollow Rd Westbury,NY11590 06-1655704	Health Care	NY	501(C)(3)	9	LIJMC		No
(105)Staten Island Faculty Medical Affiliates 972 Brush Hollow Rd Westbury,NY11590 85-0710387	Billing	NY	501(C)(3)	12, Type I	SIUH		No
(106)Staten Island Performing Provider System 972 Brush Hollow Rd Westbury,NY11590 47-2544659	DSRIP	NY	501(C)(3)	10	SIUH		No
(107)Staten Island University Hospital 475 Seaview Avenue Staten Island,NY10305 11-2868878	Health Care	NY	501(C)(3)	3	Healthcare		No
(108)Staten Island University Hospital Founda 360 Seaview Avenue Staten Island,NY10305 87-0765787	Fundraising	NY	501(C)(3)	7	SIUH		No
(109)Suite 130 Plastic Surgery PC 972 Brush Hollow Rd Westbury,NY11590 82-1772747	Medical Servi	NY	501(C)(3)	12, Type I	LIJMC		No
(110)The Calverton Foundation Inc 972 Brush Hollow Rd Westbury,NY11590 83-1118138	Medical Servi	NY	501(C)(3)	12, Type I	Healthcare		No
(111)The Elmezzi Graduate School of Molecular 972 Brush Hollow Rd Westbury,NY11590 11-3284934	Graduate Scho	NY	501(C)(3)	2	Healthcare		No
(112)The Heart Institute 475 Seaview Avenue Staten Island,NY10305 31-1757254	Inactive	NY	501(C)(3)	12, Type I	NA		No
(113)The Long Island Home 400 Sunrise Hghwy Amityville,NY11701 11-2837244	Health Care	NY	501(C)(3)	3	LHH Corporat		No
(114)True North Flexstaff Inc 972 Brush Hollow Rd Westbury,NY11590 82-1446568	Medical Servi	NY	501(C)(3)	12, Type I	Healthcare		No
(115)True North Health Management Inc 972 Brush Hollow Rd Westbury,NY11590 81-3428274	Supporting Or	NY	501(C)(3)	12, Type I	Healthcare		No
(116)True North Medical Group PC 972 Brush Hollow Rd Westbury,NY11590 27-5078717	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(117)True North Medical of Stony Brook PC 972 Brush Hollow Rd Westbury,NY11590 88-3996234	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(118)True North Patient Safety Organization 972 Brush Hollow Rd Westbury,NY11590 83-1429773	Medical Servi	NY	501(C)(3)	12, Type I	Northwell He		No
(119)True North Telemedicine PC 972 Brush Hollow Rd Westbury,NY11590 92-0286918	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(120)True North Urgent Care of Pennsylvania 972 Brush Hollow Rd Westbury,NY11590 88-2228391	Medical Servi	PA	501(C)(3)	Applied For	NSUH		No
(121)True North Virtual Health Medicine PC 972 Brush Hollow Rd Westbury,NY11590 92-0590462	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(122)Virtual Health Medicine PC 972 Brush Hollow Rd Westbury,NY11590 27-4384326	Medical Servi	NY	501(C)(3)	10	NSUH		No
(123)Visiting Nurse Association of Hudson Val 540 White Plains Rd Tarrytown,NY10591 13-1739952	Home Health C	NY	501(C)(3)	10	Healthcare		No
(124)VNA Home Health Services Inc 540 White Plains Rd Tarrytown,NY10591 13-3690105	Home Health C	NY	501(C)(3)	10	VNA Hudson		No
(125)Wellbridge Psychiatry PC 972 Brush Hollow Rd Westbury,NY11590 46-5495054	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(126)Westchester Health Medical PC 972 Brush Hollow Rd Westbury,NY11590 47-4539584	Medical Servi	NY	501(C)(3)	12, Type I	NSUH		No
(127)White Hall Dental PC 972 Brush Hollow Rd Westbury,NY11590 88-1847998	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(128)Medical Services of Mount Sinai PC 972 Brush Hollow Rd Westbury,NY11590 93-1889335	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(129)Medical Services of Suffolk PC 972 Brush Hollow Rd Westbury,NY11590 92-3415989	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(130)Northwell Health Medical NJ PC 972 Brush Hollow Rd Westbury,NY11590 93-2096172	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(131)Northwell Health Medical PA PC 972 Brush Hollow Rd Westbury,NY11590 93-2921150	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(132)Northwell Health Medical Inc 972 Brush Hollow Rd Westbury,NY11590 93-3512438	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No
(133)Northwell Telehealth Medicine of Pennsyl 972 Brush Hollow Rd Westbury,NY11590 93-2273872	Medical Servi	NY	501(C)(3)	Applied For	NSUH		No

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 50135Y

Schedule R (Form 990) 2023

Page 2

Part III

Identification of Related Organizations Taxable as a Partnership. Complete if the organization answered "Yes" on Form 990, Part IV, line 34, because it had one or more related organizations treated as a partnership during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(f) Share of total income	(g) Share of end-of-year assets	(h) Disproprtionate allocations?		(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	(j) General or managing partner?		(k) Percentage ownership
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(f) Share of total income	(g) Share of end-of-year assets	Yes	No	(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	Yes	No	(k) Percentage ownership
(1) Brooklyn Ambulatory Services LLC 972 Brush Hollow Rd Westbury,NY11590 81-2910850	Medical Svcs	NY	Healthcare
(2) DHCH LLC 972 Brush Hollow Rd Westbury,NY11590 81-1030907	Medical Svcs	NY	Endoscopy Ventu
(3) Endo Group LLC 972 Brush Hollow Rd Westbury,NY11590 20-0248148	Medical Svcs	NY	Ventures GCSC
(4) Endoscopy Center of Long Island 972 Brush Hollow Rd Westbury,NY11590 26-0000980	Medical Svcs	NY	NS-LIJ Ventures
(5) Formativ Health Intermediate LLC 972 Brush Hollow Rd Westbury,NY11590 81-4614788	Holding Co	DE	Formativ Health
(6) Formativ Health LLC 972 Brush Hollow Rd Westbury,NY11590 81-3121231	Holding Co	DE	TN Health Svcs
(7) Hospital City LLC 972 Brush Hollow Rd Westbury,NY11590 47-4091780	Inactive	DE	Northwell Healt
(8) Krasnoff Consultative Services LLC 972 Brush Hollow Rd Westbury,NY11590 26-2838027	Consulting	NY	Care Mgmt Grp
(9) Long Island Center for Digestive Health 106 Charles Lindbergh Blvd Garden City,NY11553 36-4444162	Medical Svcs	NY	LICDH Ventures
(10) Melville SC LLC 1895 Walt Whitman Rd Melville,NY11747 20-3487522	Medical Svcs	NY	Melville ASC
(11) North Shore-LIJ and Yale New Haven Healt 972 Brush Hollow Rd Westbury,NY11590 46-4858222	Air Transport	NY	NSUH
(12) North Shore-LIJ Contract Research Organi 972 Brush Hollow Rd Westbury,NY11590 46-4469806	Research	NY	Healthcare
(13) Northwell Genomics Alliance LLC 972 Brush Hollow Rd Westbury,NY11590 81-0826710	Inactive	DE	NWH Labs
(14) Northwell Health Sleep Lab LLC 972 Brush Hollow Rd Westbury,NY11590 82-1516748	Medical Svcs	NY	Sleep Holdings
(15) Phelps Professional Building Corp LP 777 North Broadway Sleepy Hollow,NY10591 13-3645137	Real Estate	NY	PMHA
(16) South Shore Surgery Center LLC 972 Brush Hollow Rd Westbury,NY11590 34-1997077	Medical Svcs	NY	Multispecialty
(17) SRO Health LLC 972 Brush Hollow Rd Westbury,NY11590 83-2198509	Medical Svcs	NY	TN Health Svcs
(18) Surgical Specialty Center of Westchester 972 Brush Hollow Rd Westbury,NY11590 81-4359712	Medical Svcs	NY	Multispecialty
(19) True North II DC LLC 972 Brush Hollow Rd Westbury,NY11590 35-2568005	Medical Svcs	NY	DC Holding
(20) True North III DC LLC 972 Brush Hollow Rd Westbury,NY11590 84-2948112	Medical Svcs	NY	DC Holding
(21) True North IV DC LLC 972 Brush Hollow Rd Westbury,NY11590 61-1816900	Medical Svcs	NY	DC Holding
(22) True North Medical at North Suffolk PLL 972 Brush Hollow Rd Westbury,NY11590 88-3236273	Medical Svcs	NY	TN Med Group
(23) True North Revenue Cycle Management Serv 972 Brush Hollow Rd Westbury,NY11590 46-5302234	Holding Co	NY	NSENT
(24) True North Urgent Care LLC 972 Brush Hollow Rd Westbury,NY11590 46-4113494	Medical Svcs	NY	NSLIJ Urgent Ca
(25) True North V DC LLC 972 Brush Hollow Rd Westbury,NY11590 32-0518811	Medical Svcs	NY	DC Holding
(26) True North VI DC LLC 972 Brush Hollow Rd Westbury,NY11590 85-3288548	Medical Svcs	NY	DC Holding
(27) Truvance Holdings LLC 972 Brush Hollow Rd Westbury,NY11590 92-3771701	Medical Svcs	NY	Truvance Ventur
(28) Truvance Go-Health Urgent Care LLC 972 Brush Hollow Rd Westbury,NY11590 92-1207895	Medical Svcs	NY	Truvance Holdin

Part IV

Identification of Related Organizations Taxable as a Corporation or Trust. Complete if the organization answered "Yes" on Form 990, Part IV, line 34 because it had one or more related organizations treated as a corporation or trust during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(e) Type of entity (C corp, S corp, or trust)	(f) Share of total income	(g) Share of end-of-year assets	(h) Percentage ownership	(i) Section 512(b)(13) controlled entity?
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(e) Type of entity (C corp, S corp, or trust)	(f) Share of total income	(g) Share of end-of-year assets	(h) Percentage ownership	Yes	No
(1) Autoimmune Research Therapeutics 972 Brush Hollow Rd Westbury,NY11590 27-0701489	Inactive	NY	Feinstein	C					No
(2) Care Management Group of Greater NY 972 Brush Hollow Rd Westbury,NY11590 11-3336381	Business Service	NY	NSH Enterprise	C					No
(3) CareConnect Group Holding Company Inc 972 Brush Hollow Rd Westbury,NY11590 47-2478692	Holding Co	NY	Hplan Holding	C					No
(4) CareConnect Insurance Co 972 Brush Hollow Rd Westbury,NY11590 46-2270382	Insurance	NY	Group Holding	C					No
(5) EvidencePoint Inc 972 Brush Hollow Rd Westbury,NY11590 85-3582198	Inactive	NY	Northwell Holdi	C					No
(6) Feinstein Center for Bioelectronic Medic 972 Brush Hollow Rd Westbury,NY11590 81-2885700	Inactive	NY	Feinstein	C					No
(7) Formativ Health Management Inc 972 Brush Hollow Rd Westbury,NY11590 81-3454243	Holding Co	DE	Formativ Health	C					No
(8) Formativ Health NewCo Inc 972 Brush Hollow Rd Westbury,NY11590 81-3928889	Holding Co	DE	Formativ Health	C					No
(9) Medical Services of Riverhead PC 972 Brush Hollow Rd Westbury,NY11590 30-0920275	Medical Services	NY	Central Suffolk	C					No
(10) Montauk Risk Retention Group Inc 972 Brush Hollow Rd Westbury,NY11590 82-2587942	Insurance	NY	Healthcare	C					No
(11) North Shore Health Enterprises Inc 972 Brush Hollow Rd Westbury,NY11590 06-1605319	Holding Comp	NY	NSHS Enterprise	C					No
(12) North Shore Health System Enterprises I 972 Brush Hollow Rd Westbury,NY11590 11-3316922	Holding Comp	NY	Northwell Healt	C					No
(13) North Shore IPA 5 Inc 972 Brush Hollow Rd Westbury,NY11590 11-3383468	Business Services	NY	Healthcare	C					No
(14) North Shore Medical Accelerator PC 972 Brush Hollow Rd Westbury,NY11590 11-2945979	Medical Services	NY	NSUH	S					No
(15) North Shore-LIJ CareConnect Insurance Ag 972 Brush Hollow Rd Westbury,NY11590 47-1994548	Insurance Agency	NY	Group Holding	C					No
(16) North Shore-LIJ Network Inc 972 Brush Hollow Rd Westbury,NY11590 32-0257193	Support Services	NY	Healthcare	C					No
(17) North Shore-LIJ Ophthalmology Institute 972 Brush Hollow Rd Westbury,NY11590 30-0930851	Inactive	NY	Healthcare	C					No
(18) North Shore-LIJ Urgent Care PC 972 Brush Hollow Rd Westbury,NY11590 47-1758444	Medical Services	NY	NSUH	C					No
(19) Northwell Direct Inc 972 Brush Hollow Rd Westbury,NY11590 84-2739816	Business Services	NY	NW Holdings	C					No
(20) Northwell Direct Administrative Services 972 Brush Hollow Rd Westbury,NY11590 47-5182974	Admin	NY	NW Holdings	C					No
(21) Northwell FlexStaff Inc 972 Brush Hollow Rd Westbury,NY11590 81-0836815	Medical Services	NY	NSH Enterprise	C					No
(22) Northwell Health Medical Surgical PC 972 Brush Hollow Rd Westbury,NY11590 83-2198276	Medical Services	NJ	SIUH	C					No
(23) Northwell Health Regional Alliance Inc 972 Brush Hollow Rd Westbury,NY11590 26-3651575	Support Services	NY	NA	C					No
(24) Northwell Holdings Inc 972 Brush Hollow Rd Westbury,NY11590 83-4045975	Business Services	NY	NSHS Enterprise	C					No
(25) NWHC Health Management Services Inc 400 East Main St Mount Kisco,NY10549 13-3697510	Health Mgmt	NY	NORCORP	C					No
(26) Peconic Bay Medical Services PC 972 Brush Hollow Rd Westbury,NY11590 47-2151802	Medical Services	NY	Central Suffolk	C					No
(27) Peconic Bay Primary Medical Care PC 972 Brush Hollow Rd Westbury,NY11590 11-3265111	Medical Services	NY	Central Suffolk	C					No
(28) PMHC Realty Corporation 701 North Broadway Sleepy Hollow,NY10591 13-3645135	Real Estate	NY	Phelps Memorial	C					No
(29) Prime Care Medical of Long Island PC 972 Brush Hollow Rd Westbury,NY11590 20-4398486	Medical Services	NY	Central Suffolk	C					No
(30) Regional Insurance Company LTD c/o Cedar House 41 Cedar Ave Hamilton HM 12 BD 000000000	Insurance	BD	Healthcare	C					No
(31) Regioncare Inc 972 Brush Hollow Rd Westbury,NY11590 11-3052191	Homecare	NY	NSHS Enterprise	C					No
(32) Staten Island University Hospital Perina 475 Seaview Ave Staten Island,NY10305 13-4107082	Medical Services	NY	SIUH	C					No
(33) True North 3D Inc 972 Brush Hollow Rd Westbury,NY11590 84-5176444	Business Services	NY	True North Heal	C					No
(34) True North Enterprises Inc 972 Brush Hollow Rd Westbury,NY11590 000000000	Inactive	NY	Healthcare	C					No
(35) True North Health Pharmacy Inc 972 Brush Hollow Rd Westbury,NY11590 47-1020508	Pharmacy	NY	NSHS Enterprise	C					No
(36) True North Health Inc 972 Brush Hollow Rd Westbury,NY11590 83-0616581	Medical Services	DE	Northwell Healt	C					No
(37) True North Medical at Work PC 972 Brush Hollow Rd Westbury,NY11590 88-0739758	Inactive	NY	NSUH	C					No
(38) True North Workforce Safety Consulting 972 Brush Hollow Rd Westbury,NY11590 84-2395117	Business Services	NY	True North Heal	C					No
(39) United Medical Surgical PC 256 Mason Ave Bldg B 2nd Fl Staten Island,NY10305 13-4038780	Surgical Services	NY	SIUH	C					No
(40) VivoHealth Plan Inc 972 Brush Hollow Rd Westbury,NY11590 46-1164689	Inactive	NY	Healthcare	C					No
(41) Vivohealth Inc 972 Brush Hollow Rd Westbury,NY11590 26-4118016	Inactive	NY	NSH Enterprise	C					No
(42) Black Hall Oral Maxillofacial Surgery P 972 Brush Hollow Rd Westbury,NY11590 92-0895708	Inactive	NY	NSUH	C					No
(43) Medical Services of New Hyde Park PC 972 Brush Hollow Rd Westbury,NY11590 87-3539234	Inactive	NY	NSUH	C					No
(44) True North Medical of Lenox Hill PC 972 Brush Hollow Rd Westbury,NY11590 92-3491304	Inactive	NY	NSUH	C					No
(45) True North Medical of Manhasset PC 972 Brush Hollow Rd Westbury,NY11590 92-3607865	Inactive	NY	NSUH	C					No
(46) True North Medical of Nassau PC 972 Brush Hollow Rd Westbury,NY11590 92-3468585	Inactive	NY	NSUH	C					No
(47) True North Medical of South Nassau PC 972 Brush Hollow Rd Westbury,NY11590 92-3586949	Inactive	NY	NSUH	C					No
(48) True North Medical of Suffolk PC 972 Brush Hollow Rd Westbury,NY11590 92-4015183	Inactive	NY	NSUH	C					No
(49) Northwell Telehealth Medicine of Connect 972 Brush Hollow Rd Westbury,NY11590 93-3729370	Medical Services	NY	NSUH	C					No
(50) True North Urgent Care of Connecticut P 972 Brush Hollow Rd Westbury,NY11590 93-1344653	Medical Services	NY	NSUH	C					No

Schedule R (Form 990) 2023

Page 3

Part V

Transactions With Related Organizations. Complete if the organization answered "Yes" on Form 990, Part IV, line 34, 35b, or 36.

Note. Complete line 1 if any entity is listed in Parts II, III, or IV of this schedule.

Yes

1 During the tax year, did the orgranization engage in any of the following transactions with one or more related organizations listed in Parts II-IV?

a Receipt of (i) interest, (ii) annuities, (iii) royalties, or (iv) rent from a controlled entity .....................

b Gift, grant, or capital contribution to related organization(s) ............................

c Gift, grant, or capital contribution from related organization(s) ............................

d Loans or loan guarantees to or for related organization(s) ............................

e Loans or loan guarantees by related organization(s) ............................

f Dividends from related organization(s) ............................

g Sale of assets to related organization(s) ............................

h Purchase of assets from related organization(s) ............................

i Exchange of assets with related organization(s) ............................

j Lease of facilities, equipment, or other assets to related organization(s) .......................

k Lease of facilities, equipment, or other assets from related organization(s) ......................

l Performance of services or membership or fundraising solicitations for related organization(s) .....................

m Performance of services or membership or fundraising solicitations by related organization(s) .................

Yes

n Sharing of facilities, equipment, mailing lists, or other assets with related organization(s) ...................

o Sharing of paid employees with related organization(s) ............................

Yes

p Reimbursement paid to related organization(s) for expenses ............................

Yes

q Reimbursement paid by related organization(s) for expenses ............................

r Other transfer of cash or property to related organization(s) ............................

s Other transfer of cash or property from related organization(s) ............................

Yes

If the answer to any of the above is "Yes," see the instructions for information on who must complete this line, including covered relationships and transaction thresholds.

(a) Name of related organization	(b) Transaction type (a-s)	(c) Amount involved	(d) Method of determining amount involved

Schedule R (Form 990) 2023

Page 4

Part VI

Unrelated Organizations Taxable as a Partnership. Complete if the organization answered "Yes" on Form 990, Part IV, line 37.

Provide the following information for each entity taxed as a partnership through which the organization conducted more than five percent of its activities (measured by total assets or gross revenue) that was not a related organization. See instructions regarding exclusion for certain investment partnerships.

(a) Name, address, and EIN of entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	(e) Are all partners section 501(c)(3) organizations?		(f) Share of total income	(g) Share of end-of-year assets	(h) Disproprtionate allocations?		(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	(j) General or managing partner?		(k) Percentage ownership
(a) Name, address, and EIN of entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	Yes	No	(f) Share of total income	(g) Share of end-of-year assets	Yes	No	(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	Yes	No	(k) Percentage ownership

Schedule R (Form 990) 2023

Page 5

Part VII

Supplemental Information

Provide additional information for responses to questions on Schedule R. See instructions.

Return Reference	Explanation

Schedule R (Form 990) 2023

Additional Data

Software ID:
Software Version:

1	Briefly describe the organization’s mission or most significant activities: THE FEINSTEIN INSTITUTE FOR MEDICAL RESEARCH STRIVES TO IMPROVE THE HEALTH OF THE COMMUNITIES IT SERVES AND IS COMMITTED TO FINDING NEW ADVANCES IN MEDICINE THROUGH RESEARCH
2	Check this box
3	Number of voting members of the governing body (Part VI, line 1a) ........	3	31
4	Number of independent voting members of the governing body (Part VI, line 1b) .....	4	20
5	Total number of individuals employed in calendar year 2023 (Part V, line 2a) ......	5	723
6	Total number of volunteers (estimate if necessary) .............	6	0
7a	Total unrelated business revenue from Part VIII, column (C), line 12 ........	7a	3,722,026
b	Net unrelated business taxable income from Form 990-T, Part I, line 11 .........	7b	0

		Prior Year	Current Year
8	Contributions and grants (Part VIII, line 1h) .........	121,914,605	136,606,771
9	Program service revenue (Part VIII, line 2g) .........	12,945,133	12,774,020
10	Investment income (Part VIII, column (A), lines 3, 4, and 7d ) ....	1,584,959	2,568,120
11	Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e)	372,395	823,336
12	Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12)	136,817,092	152,772,247
13	Grants and similar amounts paid (Part IX, column (A), lines 1–3 )...	0	0
14	Benefits paid to or for members (Part IX, column (A), line 4).....	0	0
15	Salaries, other compensation, employee benefits (Part IX, column (A), lines 5–10)	98,884,447	107,830,858
16a	Professional fundraising fees (Part IX, column (A), line 11e) .....	0	0
b	Total fundraising expenses (Part IX, column (D), line 25) 8,644,565
17	Other expenses (Part IX, column (A), lines 11a–11d, 11f–24e)....	38,221,069	43,053,175
18	Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25)	137,105,516	150,884,033
19	Revenue less expenses. Subtract line 18 from line 12.......	-288,424	1,888,214
		Beginning of Current Year	End of Year
20	Total assets (Part X, line 16).............	210,719,887	222,810,628
21	Total liabilities (Part X, line 26).............	49,399,513	50,017,377
22	Net assets or fund balances. Subtract line 21 from line 20.....	161,320,374	172,793,251

Sign Here

	Signature of officer	Date

	Type or print name and title


4a	(Code: ) (Expenses $ 130,802,782 including grants of $ ) (Revenue $ 12,774,020 )
	The Feinstein Institute for Medical Research conducts direct continuous active medical research in the areas of molecular biology, biostatistics, electron microscopy, nuclear physics molecular genetics, electron microscopy, nuclear physics, molecular genetics, molecular immunology, animal facility, pediatrics, Gastrointestinal biochemical and PET/Cyclotron activities.

4b	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )












4c	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )












4d	Other program services (Describe in Schedule O.)
	(Expenses $ including grants of $ ) (Revenue $ )
4e	Total program service expenses130,802,782

(A) Name and title	(B) Average hours per week (list any hours for related organizations below dotted line)	(C) Position (do not check more than one box, unless person is both an officer and a director/trustee)		(D) Reportable compensation from the organization (W-2/1099-MISC/1099-NEC)	(E) Reportable compensation from related organizations (W-2/1099-MISC/1099-NEC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and title
(18) SCOTT RECHLER........................................................................ Co-Chairman	0.0 .......................3.0	X	X	0	0	0
(19) JACK ROSS........................................................................ Vice Chairman	0.0 .......................2.0	X	X	0	0	0
(20) ROBERT CATELL........................................................................ Treasurer	0.0 .......................2.0	X	X	0	0	0
(21) SUSAN CLASTER........................................................................ Secretary	0.0 .......................2.0	X	X	0	0	0
(22) NON COMPENSATED TRUSTEES........................................................................ SEE SCHEDULE O	0.0 .......................2.0	X		0	0	0

1b	Sub-Total..............
c	Total from continuation sheets to Part VII, Section A..
d	Total (add lines 1b and 1c).........	5,555,843	18,596,847	974,289

1a	Federated campaigns..		1a
b	Membership dues..		1b
c	Fundraising events..		1c
d	Related organizations		1d	65,765,308
e	Government grants (contributions)		1e	49,181,615

f	All other contributions, gifts, grants, and similar amounts not included above		1f	21,659,848

g	Noncash contributions included in lines 1a - 1f:$		1g

h Total. Add lines 1a-1f.......		136,606,771

		Business Code
2a	PATIENT REVENUE	621300	836,327	836,327
b	CYCLOTRON	621300	3,722,026		3,722,026
c	BIOELECTRONIC RESEARCH REVENUE	541900	8,215,667	8,215,667
d
e
f	All other program service revenue.
g	Total. Add lines 2a–2f .....		12,774,020

3 Investment income (including dividends, interest, and othersimilar amounts) ......			1,314,548			1,314,548
4 Income from investment of tax-exempt bond proceeds			0
5 Royalties...........			0
			(i) Real	(ii) Personal
6a	Gross rents	6a	43,216
b	Less: rental expenses	6b	18,892
c	Rental income or (loss)	6c	24,324	0
d	Net rental income or (loss).......			24,324			24,324
			(i) Securities	(ii) Other
7a	Gross amount from sales of assets other than inventory	7a	29,131,270
b	Less: cost or other basis and sales expenses	7b	27,877,698
c	Gain or (loss)	7c	1,253,572
d	Net gain or (loss).........			1,253,572			1,253,572
8a	Gross income from fundraising events (not including $ of contributions reported on line 1c). See Part IV, line 18 ....
			8a	0
b	Less: direct expenses ...		8b	0
c	Net income or (loss) from fundraising events..			0
9a	Gross income from gaming activities. See Part IV, line 19 ...
			9a	0
b	Less: direct expenses ...		9b	0
c	Net income or (loss) from gaming activities..			0
10a	Gross sales of inventory, less returns and allowances ..
			10a	0
b	Less: cost of goods sold ..		10b	0
c	Net income or (loss) from sales of inventory..			0

Business Code
11a	OTHER OPERATING REVENUE		900099	799,012	799,012
b
c
d	All other revenue ....
e	Total. Add lines 11a–11d ......			799,012
12	Total revenue. See instructions.....			152,772,247	9,851,006	3,722,026	2,592,444

1	Grants and other assistance to domestic organizations and domestic governments. See Part IV, line 21 ....	0
2	Grants and other assistance to domestic individuals. See Part IV, line 22 ...........	0
3	Grants and other assistance to foreign organizations, foreign governments, and foreign individuals. See Part IV, lines 15 and 16. .............	0
4	Benefits paid to or for members .......	0
5	Compensation of current officers, directors, trustees, and key employees ...........	2,499,754	2,499,754
6	Compensation not included above, to disqualified persons (as defined under section 4958(f)(1)) and persons described in section 4958(c)(3)(B) .........	0
7	Other salaries and wages........	79,259,877	68,439,351	6,162,512	4,658,014
8	Pension plan accruals and contributions (include section 401(k) and 403(b) employer contributions) ....	4,129,441	3,565,691	321,067	242,683
9	Other employee benefits .......	16,958,955	14,643,725	1,318,571	996,659
10	Payroll taxes ...........	4,982,831	4,302,577	387,419	292,835
11	Fees for services (non-employees):
a	Management ......	1,297,317	1,120,208	100,867	76,242
b	Legal .........	118,563		67,524	51,039
c	Accounting ...........	0
d	Lobbying ...........	0
e	Professional fundraising services. See Part IV, line 17	0
f	Investment management fees ......	0
g	Other (If line 11g amount exceeds 10% of line 25, column (A) amount, list line 11g expenses on Schedule O)	536,167	462,970	41,687	31,510
12	Advertising and promotion ....	45,525	39,310	3,540	2,675
13	Office expenses .......	10,281,053	8,877,488	799,359	604,206
14	Information technology ......	0
15	Royalties ..	0
16	Occupancy ...........	4,262,365	3,680,469	331,402	250,494
17	Travel ............	733,722	733,722
18	Payments of travel or entertainment expenses for any federal, state, or local public officials .	0
19	Conferences, conventions, and meetings ....	712,779	712,779
20	Interest ...........	0
21	Payments to affiliates .......	0
22	Depreciation, depletion, and amortization ..	7,523,206	6,496,141	584,935	442,130
23	Insurance ...	128,418	110,886	9,985	7,547
24	Other expenses. Itemize expenses not covered above (List miscellaneous expenses in line 24e. If line 24e amount exceeds 10% of line 25, column (A) amount, list line 24e expenses on Schedule O.)
a	PURCHASED SERVICES	11,239,632	11,239,632
b	DUES & SUBSCRIPTIONS	1,012,860	874,585	78,750	59,525
c	CENTRALIZED ADMIN EXPENSE	1,683,210		958,623	724,587
d	MISC. EXPENSE	3,478,358	3,003,494	270,445	204,419
e	All other expenses
25	Total functional expenses. Add lines 1 through 24e	150,884,033	130,802,782	11,436,686	8,644,565
26	Joint costs. Complete this line only if the organization reported in column (B) joint costs from a combined educational campaign and fundraising solicitation. Check here if following SOP 98-2 (ASC 958-720).

1	Cash–non-interest-bearing ........			0	1	0
2	Savings and temporary cash investments .........			0	2	0
3	Pledges and grants receivable, net ......			13,942,715	3	16,746,612
4	Accounts receivable, net .............			569,101	4	979,047
5	Loans and other receivables from any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .......
				0	5	0
6	Loans and other receivables from other disqualified persons (as defined under section 4958(f)(1)), and persons described in section 4958(c)(3)(B) ...
				0	6	0
7	Notes and loans receivable, net ...........			0	7	0
8	Inventories for sale or use ............			523	8	523
9	Prepaid expenses and deferred charges ......			821,348	9	674,607
10a	Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D	10a	115,558,752
b	Less: accumulated depreciation	10b	47,441,643	71,800,037	10c	68,117,109
11	Investments—publicly traded securities .			43,502,598	11	52,637,049
12	Investments—other securities. See Part IV, line 11 .....			0	12	0
13	Investments—program-related. See Part IV, line 11 ..			0	13	0
14	Intangible assets ...............			0	14	0
15	Other assets. See Part IV, line 11 ...........			80,083,565	15	83,655,681
16	Total assets. Add lines 1 through 15 (must equal line 33)...			210,719,887	16	222,810,628

17	Accounts payable and accrued expenses .....	27,125,974	17	27,578,354
18	Grants payable ...	0	18	0
19	Deferred revenue .........	0	19	0
20	Tax-exempt bond liabilities .........	0	20	0
21	Escrow or custodial account liability. Complete Part IV of Schedule D	0	21	0
22	Loans and other payables to any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .........
		0	22	0
23	Secured mortgages and notes payable to unrelated third parties ..	0	23	0
24	Unsecured notes and loans payable to unrelated third parties ..	0	24	0
25	Other liabilities (including federal income tax, payables to related third parties, and other liabilities not included on lines 17 - 24). Complete Part X of Schedule D	22,273,539	25	22,439,023
26	Total liabilities. Add lines 17 through 25..	49,399,513	26	50,017,377

	Organizations that follow FASB ASC 958, check here and complete lines 27, 28, 32, and 33.
27	Net assets without donor restrictions ..........	15,092,500	27	12,675,950
28	Net assets with donor restrictions ...........	146,227,874	28	160,117,301
	Organizations that do not follow FASB ASC 958, check here and complete lines 29 through 33.
29	Capital stock or trust principal, or current funds .....		29
30	Paid-in or capital surplus, or land, building or equipment fund ...		30
31	Retained earnings, endowment, accumulated income, or other funds		31
32	Total net assets or fund balances ...........	161,320,374	32	172,793,251
33	Total liabilities and net assets/fund balances ........	210,719,887	33	222,810,628