Owners/Mass General Brigham

Mass General Brigham

Example: fully unlocked, as a paid account sees it

Health system: 13 hospitals, 136 outpatient sites, ERs and clinics, 35 urgent care centers.

Last confirmed 2026-10-30 · Sources: CMS Medicare enrollment and hospital ownership (PECOS), Provider of Services, the company's own locations, NPPES

Hospitals
13
Outpatient sites, ERs and clinics
136
Urgent care centers
35
Hospital beds
3,362
States
2

Who it is

as of 2026-10-24
Legal name
Mass General Brigham Incorporated · ProPublica Nonprofit Explorer (IRS)
Tax status
nonprofit · ProPublica Nonprofit Explorer (IRS)
Headquarters
MA

Portfolio map

157 mapped
  • Hospital
  • Hospital outpatient site
  • Urgent care
  • Size: beds
  • Mass General Brigham
  • Massachusetts Eye and Ear Infirmary
  • Mass General Brigham
  • Mass General Brigham Urgent Care LLC
  • Mass General Brigham
  • Mass General Brigham Community Physicians on Demand
  • Other systems and operators

Circles are hospitals, sized by beds; diamonds are hospital outpatient sites, triangles urgent care.

Hospitals

3,362 beds · 150,553 discharges · $7.1B net patient revenue
HospitalCityBedsDischargesPatient-care marginMedicare daysMedicaid days
Massachusetts General HospitalBoston, MA99746,158-45.6%33%10%
Brigham and Women's HospitalBoston, MA81841,488–29%9%
McLean HospitalBelmont, MA3096,322-56.2%14%7%
North Shore Medical Center -Salem, MA28117,213-12.3%36%9%
Newton-Wellesley HospitalNewton, MA24017,496-2.2%38%3%
Spaulding Hospital for Continuing Med Care-CambCambridge, MA180875-55.8%32%–
Brigham and Women's Faulkner HospitalJamaica Plain, MA1478,327-0.6%41%4%
Spaulding Rehabilitation HospitalCharlestown, MA1322,783-28.1%33%5%
The Cooley Dickinson HospitalNorthampton, MA1185,2783.9%37%7%
Spaulding Rehabilitation Hospital - Cape CodEast Sandwich, MA601,233-13.3%62%2%
Massachusetts Eye and Ear InfirmaryBoston, MA411,555-38.7%25%9%
Martha's Vineyard HospitalOak Bluffs, MA251,3030.3%60%6%
Nantucket Cottage HospitalNantucket, MA14522–52%10%
Medicare cost reports, 2024. Pooled across the system: patient-care margin -32.7%, Medicare 32% and Medicaid 8% of inpatient days. Patient-care margin leaves out research grants and philanthropy, so academic medical centers often show negatives while their net income is positive.

Market position

largest hospital owner in 5 of 7 counties
CountyIts hospitalsIts bedsAll hospital bedsShareRank
Suffolk County, MA52,1355,66138%1 of 12
Middlesex County, MA37292,75426%1 of 10
Essex County, MA12811,31721%3 of 5
Hampshire County, MA1118118100%1 of 2
Barnstable County, MA16039615%2 of 2
Dukes County, MA12525100%1 of 1
Nantucket County, MA11414100%1 of 1
Share of hospital beds in each county where Mass General Brigham runs a hospital; rank is among owners confirmed in public records.

What it runs

Hospital outpatient site118
Urgent care center35
Short-term acute hospital8
Physician clinic8
Ambulatory surgery center5
Imaging center3
Outpatient rehabilitation2
Rehabilitation hospital2
Critical access hospital1
Psychiatric hospital1
Long-term care hospital1

Evidence behind each link

CMS Hospital All Owners69
CMS record40
AHRQ Compendium of U.S. Health Systems (hospital linkage)34
Company website25
NPPES NPI Registry13
IRS Form 9902
CMS Hospital Enrollments and All Owners (PECOS): hospital ownership graph1
Every facility here is tied to Mass General Brigham by at least one public source, dated and linked on its own page.

Mass General Brigham: owner, operators and facilities

Mass General Brigham184 facilities
Mass General Brigham
Brigham and Women's Advanced Primary Care Associates South HuntingtonJamaica Plain
Brigham and Women's Faulkner Addiction Recovery ProgramJamaica Plain
Brigham and Women's Faulkner Community PhysiciansHyde Park
Brigham and Women's Faulkner Community PhysiciansWest Roxbury
BRIGHAM AND WOMEN'S HOSPITAL - BostonBoston
BRIGHAM AND WOMEN'S HOSPITAL - Boston (221 Longwood Ave)Boston
BRIGHAM AND WOMEN'S HOSPITAL - Boston (45 Francis St)Boston
BRIGHAM AND WOMEN'S HOSPITAL - BrooklineBrookline
BRIGHAM AND WOMEN'S HOSPITAL - CambridgeCambridge
BRIGHAM AND WOMEN'S HOSPITAL - Chestnut Hill (850 Boylston St)Chestnut Hill
BRIGHAM AND WOMEN'S HOSPITAL - Jamaica PlainJamaica Plain
BRIGHAM AND WOMEN'S HOSPITAL - WaylandWayland
Brigham and Women's Infusion CenterBoston
Brigham and Women's Lung CenterBoston
Brigham and Women's Plastic Surgery Clinic at Emerson HospitalConcord
Brigham and Women's Primary Care Associates of BrooklineBrookline
Brigham and Women's Primary Care Associates of LongwoodBoston
Brigham and Women's Primary Care Associates of NorwoodNorwood
Brigham and Women's Primary Care Clinic at the Massachusetts Mental Health CenterBoston
Brigham and Women's Psychiatry ClinicNewton
Brigham and Women's Urogynecology Group at Newton-Wellesley HospitalNewton
Brigham And Womens Mri West BridgewaterWest Bridgewater
Brigham And Womens Radiology Coolidge Corner ImagingBrookline
Brigham Obstetrics and Gynecology GroupBoston
Brookside Community Health CenterJamaica Plain
Cdmg Urgent CareNorthampton
Charles River Diagnostic ImagingFramingham
Charlestown Community Health CenterCharlestown
Cooley Dickinson Hospital, Atwood Health Center, Blood DrawNorthampton
Cooley Dickinson Hospital, Blood Draw (Belchertown)Belchertown
Cooley Dickinson Hospital, Blood Draw (Florence)Florence
Cooley Dickinson Hospital, Blood Draw (South Deerfield)South Deerfield
Cooley Dickinson Physical Therapy ClinicWorthington
Cooley Dickinson Rehabilitation ServicesNorthampton
Cooley Dickinson Wellness and Sports Performance CenterWest Hatfield
Ingalls Elementary SbhcLynn
Lynn Classical High School SbhcLynn
Lynn Community Health CenterLynn
Lynn Community Health CenterLynn
Lynn Community Health Center School Based ProgramLynn
Lynn Community Health Center School Based Program At Harrington ElementaryLynn
Lynn English High School SbhcLynn
Lynn Vocational Technical High School SbhcLynn
Martha's Vineyard Hospital at Indian Hill RoadVineyard Haven
Mass General Brigham (South Deerfield, 21B Elm St)South Deerfield
Mass General Brigham Blood Draw (Saugus)Saugus
Mass General Brigham for Children at Salem HospitalSalem
Mass General Brigham Heart and Vascular Institute at Brigham and Women's HospitalBoston
Mass General Broadway Primary Care at RevereRevere
Mass General Waltham Outpatient Surgery CenterWaltham
Massachusetts General Anticoagulation Management ServiceBoston
Massachusetts General Back Bay Healthcare CenterBoston
Massachusetts General Beacon Hill Primary Care ClinicBoston
Massachusetts General Benson-Henry Institute for Mind Body MedicineBoston
Massachusetts General Brain and Body ProgramBoston
Massachusetts General clinics at 102 Endicott Street, DanversDanvers
Massachusetts General clinics at 52 Second Avenue, WalthamWaltham
Massachusetts General clinics at Chelsea Community Health Center (100 Everett Ave)Chelsea
Massachusetts General Everett Family Care ClinicEverett
Massachusetts General Fertility CenterBoston
MASSACHUSETTS GENERAL HOSPITAL - ArlingtonArlington
MASSACHUSETTS GENERAL HOSPITAL - AttleboroAttleboro
MASSACHUSETTS GENERAL HOSPITAL - Boston (15 Parkman St, Wang building)Boston
MASSACHUSETTS GENERAL HOSPITAL - Boston (175 Cambridge St)Boston
MASSACHUSETTS GENERAL HOSPITAL - BrocktonBrockton
MASSACHUSETTS GENERAL HOSPITAL - North AndoverNorth Andover
MASSACHUSETTS GENERAL HOSPITAL - RandolphRandolph
MASSACHUSETTS GENERAL HOSPITAL - SomervilleSomerville
MASSACHUSETTS GENERAL HOSPITAL - South BostonSouth Boston
Massachusetts General Hospital, Blood Draw (North End)Boston
Massachusetts General Medical GroupBoston
Massachusetts General Pain Management CenterWaltham
Massachusetts General Physical Medicine and Rehabilitation ClinicFoxborough
Massachusetts General Primary Care ClinicBoston
Massachusetts General Psychiatry at Bowdoin SquareBoston
Massachusetts General Pulmonary ClinicBoston
Massachusetts General Sumner M. Redstone Burn CenterBoston
Massachusetts General Thoracic Surgery ClinicBoston
Massachusetts General Urology ClinicBoston
McLean Addiction Treatment Center at FernsidePrinceton
McLean Child and Adolescent Outpatient Clinic (MAMP)Cambridge
McLean SouthEastMiddleboro
Merrimack Valley Endoscopy CenterHaverhill
Nantucket Cottage PharmacyNantucket
Newton-Wellesley - McLean Psychiatry Services at Bridge by EpochLexington
NEWTON-WELLESLEY HOSPITAL - WestfordWestford
Newton-Wellesley Hospital, Blood Draw (Natick)Natick
Newton-Wellesley Hospital, Blood Draw (Walpole)Walpole
Newton-Wellesley Hospital, Blood Draw (Waltham)Waltham
Newton-Wellesley Hospital, Blood Draw (Wellesley)Wellesley
Newton-Wellesley Kaplan Joint CenterNewton
Newton-Wellesley McLean Psychiatric Services at AdelaideNewton Centre
Newton-Wellesley Outpatient Surgery CenterWellesley
Newton-Wellesley Sleep CenterNewton
Newton-Wellesley Sports Physical Therapy Clinic at the Wells Ave YMCANewton
Outpatient Surgery Center At Mass General WalthamWaltham
Revere Community Health CenterRevere
Salem Hospital Emergency DepartmentSalem
Salem Hospital Mental Health Outpatient ServicesSalem
Salem Hospital Physical Medicine and Rehabilitation ClinicSalem
Salem Hospital, Blood Draw (Danvers, 1 Hutchinson Dr)Danvers
Salem Hospital, Blood Draw (Danvers, 104 Endicott St)Danvers
Salem Hospital, Blood Draw (Marblehead)Marblehead
South Shore Endoscopy CenterBraintree
Southern Jamaica Plain Community Health CenterJamaica Plain
Spaulding Eileen M Ward Outpatient Center For Children SandwichForestdale
Spaulding Eileen M Ward Outpatient Center For Children SandwichSandwich
SPAULDING HOSPITAL FOR CONTINUING MED CARE-CAMB - BostonBoston
Spaulding Rehabilitation Center for Children in LexingtonLexington
Spaulding Rehabilitation Eileen M. Ward Outpatient Center for Children (Sandwich)Sandwich
Spaulding Rehabilitation Hospital (Charlestown)Charlestown
Spaulding Rehabilitation Outpatient Center (Brighton)Brighton
Spaulding Rehabilitation Outpatient Center (Cambridge)Cambridge
Spaulding Rehabilitation Outpatient Center (Cape Ann)Gloucester
Spaulding Rehabilitation Outpatient Center (Framingham)Framingham
Spaulding Rehabilitation Outpatient Center (Hyannis)Hyannis
Spaulding Rehabilitation Outpatient Center (Lynn)Lynn
Spaulding Rehabilitation Outpatient Center (Medford)Medford
Spaulding Rehabilitation Outpatient Center (Orleans)Orleans
Spaulding Rehabilitation Outpatient Center (Peabody)Peabody
Spaulding Rehabilitation Outpatient Center (Plymouth)Plymouth
Spaulding Rehabilitation Outpatient Center (Salem)Salem
Spaulding Rehabilitation Outpatient Center (Wellesley)Wellesley
Spaulding Rehabilitation Outpatient Center at Emilson YMCA (Hanover)Hanover
Spaulding Rehabilitation Outpatient Center at South Shore YMCA (Quincy)Quincy
Spaulding Rehabilitation Outpatient Center BraintreeBraintree
Spaulding Rehabilitation Outpatient Center MaldenMalden
Spaulding Rehabilitation Outpatient Center Marblehead Jewish Community CenterMarblehead
Spaulding Rehabilitation Physical Medicine and Rehabilitation ClinicNatick
Spaulding Rehabilitation Physical Therapy Clinic (Marblehead)Marblehead
Sports Medicine and Physical Therapy Associates from Nantucket Cottage HospitalNantucket
The Gunderson Residence Program at McLean HospitalCambridge
Mass General Brigham
Merrimack Valley Endoscopy Center LLCHaverhill
Mass General Brigham at Wentworth Surgery CenterSomersworth
Mass General Brigham Community Physicians on Demand
Massachusetts Eye and Ear Infirmary
From CMS ownership and enrollment records.

Where Mass General Brigham's facilities are

Mass General Brigham120American Current Care Of Massachusetts PC, GreenfieldBrigham and Women's Advanced Primary Care Associates South Huntington, Jamaica PlainBrigham and Women's Family Care Associates, BrooklineBrigham and Women's Faulkner Addiction Recovery Program, Jamaica PlainBrigham and Women's Faulkner Community Physicians, Hyde ParkBrigham and Women's Faulkner Community Physicians, West RoxburyBRIGHAM AND WOMEN'S FAULKNER HOSPITAL, JAMAICA PLAINBRIGHAM AND WOMEN'S HOSPITAL, BOSTONBRIGHAM AND WOMEN'S HOSPITAL - Boston, BostonBRIGHAM AND WOMEN'S HOSPITAL - Boston (45 Francis St), BostonBRIGHAM AND WOMEN'S HOSPITAL - Brookline, BrooklineBRIGHAM AND WOMEN'S HOSPITAL - Cambridge, CambridgeBRIGHAM AND WOMEN'S HOSPITAL - Chestnut Hill (850 Boylston St), Chestnut HillBRIGHAM AND WOMEN'S HOSPITAL - Jamaica Plain, Jamaica PlainBRIGHAM AND WOMEN'S HOSPITAL - Wayland, WaylandBrigham and Women's Infusion Center, BostonBrigham and Women's Lung Center, BostonBrigham and Women's Primary Care Associates of Longwood, BostonBrigham and Women's Primary Care Associates of Norwood, NorwoodBrigham and Women's Primary Care Clinic at the Massachusetts Mental Health Center, BostonBrigham and Women's Psychiatry Clinic, NewtonBrigham and Women's Urgent Care in Foxborough, FoxboroughBrigham and Women's Urogynecology Group at Newton-Wellesley Hospital, NewtonBrigham And Womens Mri West Bridgewater, West BridgewaterBrigham And Womens Radiology Coolidge Corner Imaging, BrooklineBrigham Obstetrics and Gynecology Group, BostonBrookside Community Health Center, Jamaica PlainCdmg Urgent Care, NorthamptonCharles River Diagnostic Imaging, FraminghamCharlestown Community Health Center, CharlestownChelsea Community Health Center Urgent Care, ChelseaCOOLEY DICKINSON HOSPITAL INC, THE, NORTHAMPTONCooley Dickinson Hospital, Atwood Health Center, Blood Draw, NorthamptonCooley Dickinson Hospital, Blood Draw (Belchertown), BelchertownCooley Dickinson Hospital, Blood Draw (Florence), FlorenceCooley Dickinson Hospital, Blood Draw (South Deerfield), South DeerfieldCooley Dickinson Physical Therapy Clinic, WorthingtonCooley Dickinson Rehabilitation Services, NorthamptonCooley Dickinson Wellness and Sports Performance Center, West HatfieldIngalls Elementary Sbhc, LynnLynn Classical High School Sbhc, LynnLynn Community Health Center, LynnLynn Community Health Center, LynnLynn Community Health Center School Based Program, LynnLynn Community Health Center School Based Program At Harrington Elementary, LynnLynn English High School Sbhc, LynnLynn Vocational Technical High School Sbhc, LynnMartha's Vineyard Hospital at Indian Hill Road, Vineyard HavenMARTHA'S VINEYARD HOSPITAL INC, OAK BLUFFSMass General Brigham (Lynn,480 Lynnfield St), LynnMass General Brigham (South Deerfield, 21B Elm St), South DeerfieldMass General Brigham Blood Draw (Saugus), SaugusMass General Brigham Community Physicians On Demand, LawrenceMass General Brigham Express Care (Amherst), AmherstMass General Brigham Express Care (Andover), AndoverMass General Brigham Express Care (Boston Common), BostonMass General Brigham Express Care (Brookline), BrooklineMass General Brigham Express Care (Danvers), DanversMass General Brigham Express Care (Lawrence), LawrenceMass General Brigham Express Care (Lynn), LynnMass General Brigham Express Care (Natick), NatickMass General Brigham Express Care (Newton), NewtonMass General Brigham Express Care (Pembroke), PembrokeMass General Brigham Express Care (South Weymouth), South WeymouthMass General Brigham Express Care (Southampton), SouthamptonMass General Brigham Express Care (Woburn), WoburnMass General Brigham Express Care at Cooley Dickinson Hospital, NorthamptonMass General Brigham for Children at Salem Hospital, SalemMass General Brigham Heart and Vascular Institute at Brigham and Women's Hospital, BostonMass General Brigham Urgent Care Llc, WoburnMass General Brigham Urgent Care Llc, NewtonMass General Brigham Urgent Care LLC, WatertownMass General Brigham Urgent Care LLC, CambridgeMass General Brigham Urgent Care LLC, CambridgeMass General Brigham Urgent Care LLC, BurlingtonMass General Broadway Primary Care at Revere, RevereMass General Waltham Outpatient Surgery Center, WalthamMASSACHUSETTS EYE AND EAR INFIRMARY, BOSTONMassachusetts General Anticoagulation Management Service, BostonMassachusetts General Back Bay Healthcare Center, BostonMassachusetts General Beacon Hill Primary Care Clinic, BostonMassachusetts General Benson-Henry Institute for Mind Body Medicine, BostonMassachusetts General Brain and Body Program, BostonMassachusetts General clinics at 102 Endicott Street, Danvers, DanversMassachusetts General clinics at 52 Second Avenue, Waltham, WalthamMassachusetts General clinics at Chelsea Community Health Center (100 Everett Ave), ChelseaMassachusetts General Everett Family Care Clinic, EverettMassachusetts General Fertility Center, BostonMASSACHUSETTS GENERAL HOSPITAL, BOSTONMASSACHUSETTS GENERAL HOSPITAL - Arlington, ArlingtonMASSACHUSETTS GENERAL HOSPITAL - Attleboro, AttleboroMASSACHUSETTS GENERAL HOSPITAL - Boston (15 Parkman St, Wang building), BostonMASSACHUSETTS GENERAL HOSPITAL - Boston (175 Cambridge St), BostonMASSACHUSETTS GENERAL HOSPITAL - Brockton, BrocktonMASSACHUSETTS GENERAL HOSPITAL - North Andover, North AndoverMASSACHUSETTS GENERAL HOSPITAL - Randolph, RandolphMASSACHUSETTS GENERAL HOSPITAL - Somerville, SomervilleMASSACHUSETTS GENERAL HOSPITAL - South Boston, South BostonMassachusetts General Hospital, Blood Draw (North End), BostonMassachusetts General Medical Group, BostonMassachusetts General Pain Management Center, WalthamMassachusetts General Physical Medicine and Rehabilitation Clinic, FoxboroughMassachusetts General Primary Care Clinic, BostonMassachusetts General Psychiatry at Bowdoin Square, BostonMassachusetts General Pulmonary Clinic, BostonMassachusetts General Sumner M. Redstone Burn Center, BostonMassachusetts General Thoracic Surgery Clinic, BostonMassachusetts General Urology Clinic, BostonMcLean Addiction Treatment Center at Fernside, PrincetonMcLean Child and Adolescent Outpatient Clinic (MAMP), CambridgeMCLEAN HOSPITAL CORPORATION, BELMONTMcLean SouthEast, MiddleboroMerrimack Valley Endoscopy Center, HaverhillMerrimack Valley Endoscopy Center LLC, HaverhillNANTUCKET COTTAGE HOSPITAL, NANTUCKETNantucket Cottage Hospital Urgent Access Clinic, NantucketNantucket Cottage Pharmacy, NantucketNewton-Wellesley - McLean Psychiatry Services at Bridge by Epoch, LexingtonNEWTON-WELLESLEY HOSPITAL, NEWTONNEWTON-WELLESLEY HOSPITAL - Westford, Westford
Each block starts at the facility's location from CMS records.

Facilities

all 184

By state

StateFacilities
Massachusetts178
New Hampshire6

Ownership tree

10 entities · 67 facilities
From CMS ownership and affiliated-entity records. Percentages are as reported to CMS.

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