Updated October 2026

Largest primary care groups in Massachusetts

Medical group directory
Massachusetts
Primary care

Groups: 677
Internal Medicine groups: 339
Nurse Practitioner groups: 200
Internal medicine specialists: 8,000
Nurse practitioner specialists: 498

There are 677 primary care groups in Massachusetts with a Medicare PAC ID: 339 internal medicine, 200 nurse practitioner, 105 family medicine, 27 physician assistant, 3 clinical nurse specialist and 3 general practice. Massachusetts General Physicians Organization (MGPO) is the largest internal medicine group, with 1,331 internal medicine specialists, and Walk-In MD Urgent Care the largest nurse practitioner group, with 15 nurse practitioner specialists.

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Massachusetts General Physicians Organization (MGPO) is the largest primary care group in Massachusetts, with 3,803 physicians

Ranked by physicians with a Massachusetts address linked to each group. Massachusetts General Hospital is second with 3,723, and Brigham and Women's Hospital third with 3,175. 56 Massachusetts groups have 100 or more physicians.

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Primary care groups in Massachusetts, ranked by physicians, 151 to 200
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
151	Gastrointestinal SpecialistsBrockton · 4 sites	-	9	15	Decision makers
152	New England Community Medical ServicesChelmsford · 4 sites	-	9	14	Decision makers
153	AFC Urgent Care ChelmsfordChelmsford · 6 sites	Parent on file	8	40	Decision makers
154	New England HospitalistsWorcester · 5 sites	-	8	30	Decision makers
155	Gather HealthQuincy · 5 sites	-	8	24	Decision makers
156	Premier Healthcare Services LLCDartmouth · 3 sites	-	8	22	Decision makers
157	Global Care Medical GroupTewksbury · 3 sites	-	8	18	Decision makers
158	Riverside Medical GroupLowell · 2 sites	-	8	16	Decision makers
159	Family Medicine Associates of South AttleboroSouth Attleboro · 2 sites	-	8	14	Decision makers
160	Melrose Internal Medicine Associates, P.C.Melrose · 1 site	-	8	11	Decision makers
161	Center for Digestive WellnessLeominster · 2 sites	-	8	10	Decision makers
162	Commonwealth Nephrology AssociatesNorfolk · 12 sites	-	8	10	Decision makers
163	Milford Gastroenterology AssociatesMilford · 1 site	-	8	9	Decision makers
164	Anchor Medical Group and Wellness CenterNew Bedford · 3 sites	-	8	8	Decision makers
165	Milton Cardiac TestingMilton · 2 sites	-	8	8	Decision makers
166	ConcertoCare (formerly Perfect Health)Boston · 7 sites	Parent on file	7	26	Decision makers
167	Bond Medical ConsultantsWestwood · 2 sites	Parent on file	7	21	Decision makers
168	Paradigm HealthcareLeeds · 2 sites	Parent on file	7	20	Decision makers
169	Shriver Clinical ServicesWakefield · 2 sites	Parent on file	7	15	Decision makers
170	Plymouth Carver Primary CarePlymouth · 2 sites	-	7	14	Decision makers
171	Hampshire Gastroenterology Associates, LLCFlorence · 1 site	-	7	13	Decision makers
172	Kronos HealthLawrence · 1 site	-	7	13	Decision makers
173	Gastrointestinal SpecialistsBrockton · 3 sites	-	7	12	Decision makers
174	Middlesex RecoveryWoburn · 6 sites	Parent on file	7	12	Decision makers
175	Springfield Medical AssociatesSpringfield · 3 sites	Parent on file	7	12	Decision makers
176	Personal Physicians HealthCareWellesley · 2 sites	-	7	7	Decision makers
177	Worcester Internal MedicineWorcester · 2 sites	-	6	27	Decision makers
178	American Family Care Urgent Care SaugusSaugus · 3 sites	Parent on file	6	21	Decision makers
179	Mill City Medical GroupLowell · 4 sites	-	6	21	Decision makers
180	Post Acute Medical ServicesActon · 3 sites	Parent on file	6	21	Decision makers
181	knownwellNeedham · 4 sites	Parent on file	6	15	Decision makers
182	Suburban Internal MedicineLee · 2 sites	-	6	15	Decision makers
183	Chelmsford Family PracticeNorth Chelmsford · 1 site	-	6	14	Decision makers
184	Suburban Internal MedicineLee · 2 sites	-	6	14	Decision makers
185	Cape Cod Primary CareOsterville · 3 sites	-	6	13	Decision makers
186	Hyannis Family Medical CareHyannis · 2 sites	-	6	13	Decision makers
187	Harvard Street Neighborhood Health CenterDorchester · 2 sites	Parent on file	6	12	Decision makers
188	Trinity Health Of New England Medical GroupSpringfield · 2 sites	Parent on file	6	12	Decision makers
189	Lown GroupChestnut Hill · 2 sites	-	6	10	Decision makers
190	Cardiovascular Consultants of Cape CodHyannis · 1 site	-	6	9	Decision makers
191	Exceptional HealthWellesley · 2 sites	-	6	9	Decision makers
192	Arlington Family PracticeArlington · 1 site	-	6	8	Decision makers
193	Kidney Care and Transplant Services of New EnglandSpringfield · 2 sites	-	6	7	Decision makers
194	Morton HospitalTaunton · 2 sites	Parent on file	6	6	Decision makers
195	Woburn Nephrology AssociatesWoburn · 3 sites	Parent on file	6	6	Decision makers
196	CVS MinuteClinicSwampscott · 4 sites	Parent on file	5	27	Decision makers
197	AFC Urgent Care WorcesterWorcester · 3 sites	Parent on file	5	26	Decision makers
198	Family MedicalLeominster · 2 sites	-	5	23	Decision makers
199	Lawrence Medical CenterLawrence · 7 sites	Parent on file	5	17	Decision makers
200	Ibis Health ServicesHarvard · 4 sites	Parent on file	5	16	Decision makers

Showing 151 to 200 of 677 primary care groups in Massachusetts

Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data

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