WM
Person · officer / director
William Mack
Vice Chairman · John T Mather Memorial Hospital
Vice Chairman at John T Mather Memorial Hospital. Listed as an officer, director, or key employee across 22 organizations on the Form 990 record.
Ambiguous identity
This name matches 17 other individuals we could not verify as the same person. Each is kept as a separate record below — treat them as distinct people unless an explicit match is confirmed.
Organizations
22
Roles reported
22
Others who share this name
17
Who this is
Profile
Everything on the left is verified from the IRS filings. The biography on the right is compiled from public web sources and grounded to that filed record.
✓ Verified from filings
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Reported as Vice Chairman of John T Mather Memorial Hospital, based in Westbury, NY.
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Also listed as Vice Chairman of Lenox Hill Hospital, uncompensated.
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Also listed as Vice Chairman of Phelps Memorial Hospital Association, uncompensated.
Facts extracted directly from each organization's Form 990, Part VII.
Biography In progress
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Affiliations
Organizations
Linked as the same person by IRS Schedule R, a shared officer mailing address, or shared fellow board members.
John T Mather Memorial Hospital
Vice Chairman · $478.6M revenue · Westbury, NYJohn T. Mather Memorial Hospital is an accredited, non-profit community hospital dedicated to providing a wide spectrum of health care services of…Filed FY2024, FY2023, FY2022 · Source: Form 990, Part VII
Lenox Hill Hospital
Vice Chairman · $2.2B revenue · Westbury, NYLENOX HILL STRIVES TO IMPROVE THE HEALTH of the communities it serves and is committed to providing the highest quality of care for the COMMUNITY…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Phelps Memorial Hospital Association
Vice Chairman · $445.0M revenue · Westbury, NYPMHA STRIVES TO IMPROVE THE HEALTH OF THE COMMUNITIES IT SERVES AND IS COMMITTED TO PROVIDING THE HIGHEST QUALITY OF CARE FOR THE COMMUNITY…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
South Shore University Hospital
Vice Chairman · $1.2B revenue · Westbury, NYSouth Shore strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care and caring for…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Long Island Jewish Medical Center
Vice Chairman · $4.6B revenue · Westbury, NYLIJMC strives to improve the health of the communities it serves and is committed to providing the highest quality of care for the community…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
North Shore University Hospital
Vice Chairman · $3.9B revenue · Westbury, NYNorth Shore strives to improve the health of the communities it serves and is committed to providing the highest quality of care for the community…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Northwell Health Stern Family Center for Rehabilitation
Vice Chairman & Trustee · $66.7M revenue · Westbury, NYTHE MISSION IS TO ENABLE RESIDENTS TO BE INDEPENDENT THROUGH SHORT-TERM REHABILITATION, AND TO PROVIDE EXTENDED CARE TO THOSE WHO NEED IT REGARDLESS…Filed FY2024 · Source: Form 990, Part VII
Northern Westchester Hospital Association
Vice Chairman · $594.0M revenue · Westbury, NYNWH STRIVES TO IMPROVE THE HEALTH OF THE COMMUNITIES IT SERVES AND IS COMMITTED TO PROVIDING THE HIGHEST QUALITY OF CARE FOR THE COMMUNITY REGARDLESS…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Staten Island University Hospital
Vice Chairman · $1.6B revenue · Westbury, NYStaten Island strives to improve the health of the communities it serves and is committed to providing the highest quality of care for the community…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Plainview Hospital
Vice Chairman · $349.7M revenue · Westbury, NYhealth of the communities it serves and is committed to providing the highest quality of care for the community regardless of ability to payFiled FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
The Long Island Home
Vice Chairman · $124.6M revenue · Amityville, NYTHE LONG ISLAND HOME STRIVES TO PROVIDE innovative, effective and cost-efficient services within an integrated community health delivery system.Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Northwell Health Foundation
Vice Chairman · $123.5M revenue · Westbury, NYFOUNDATION'S MISSION IS TO SOLICIT, RECEIVE AND ADMINISTER FUNDS TO BE USED FOR MAJOR MODERNIZATION AND OTHER HEALTH CARE RELATED SERVICES FOR…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Northwell Healthcare INC
Vice Chairman · $2.7B revenue · Westbury, NYNorthwell Healthcare, Inc. provides ADVISORY AND ADMINISTRATIVE support services to affiliated health care organizations within Northwell Health.Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Huntington Hospital Dolan Family Health Center INC
Vice Chairman · $8.7M revenue · Westbury, NYTHE HUNTINGTON HOSPITAL DOLAN FAMILY Health CENTER IS A FREE-STANDING HOSPITAL-OWNED FACILITY DEDICATED TO PROVIDING MEDICAL CARE TO THE UNINSURED…Filed FY2024 · Source: Form 990, Part VII
Glen Cove Hospital
Vice Chairman · $283.8M revenue · Westbury, NYGlen Cove strives to improve the health of the communities it serves and is committed to providing the highest quality of care for the community…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Northwell Health INC
Vice Chairman · Westbury, NYNorthwell Health is the parent company of a fully integrated health system that is committed to caring for the community regardless of ability to pay.Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Northwell INC
Vice Chairman · Westbury, NYNORTHWELL, INC IS PART OF A FULLY integrated health system that is committed to caring for the community regardless of ability to pay.Filed FY2024 · Source: Form 990, Part VII
Huntington Hospital Association
Vice Chairman · $797.3M revenue · Westbury, NYHuntington strives to Improve the health of the communities it serves and is committed to providing the highest quality of care for the community…Filed FY2024 · Source: Form 990, Part VII
Central Suffolk Hospital
Vice Chairman · $365.8M revenue · Westbury, NYCENTRAL SUFFOLK HOSPITAL ("CSH") IS A NOT-FOR-PROFIT HOSPITAL, A SKILLED NURSING FACILITY, AND A CERTIFIED HOME CARE AGENCY.Filed FY2024, FY2023, FY2022, FY2021 · Source: Form 990, Part VII
Hospice Care Network
Vice Chairman · $66.9M revenue · Westbury, NYOUR MISSION IS TO ENABLE PERSONS TO LIVE WITH PEACE AND DIGNITY IN A CARING ENVIRONMENT DURING THE FINAL STAGES OF LIFE BY OFFERING CARE AND COMFORT…Filed FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Mary Cariola Childrens Center INC
Board Member · $39.8M revenue · Rochester, NYMARY CARIOLA CHILDREN'S CENTER PROVIDES THE HIGHEST-QUALITY INDIVIDUALIZED EDUCATION, CARE AND CLINICAL SERIVCES FOR CHILDREN WITH DEVELOPMENTAL…Filed FY2023, FY2022, FY2021 · Source: Form 990, Part VII
S I U H Systems INC
Vice Chairman · Westbury, NYFiled FY2022, FY2021, FY2020 · Source: Form 990, Part VII
Disambiguation
Other people named William Mack
Different individuals who share this name, separated by IRS Schedule R, mailing address, and shared-board evidence. The 990 carries no person identifier, so some may still be the same person.
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