Updated October 2026

Largest primary care groups in Maine

Medical group directory
Maine
Primary care

Groups: 103
Internal Medicine groups: 42
Family Medicine groups: 36
Internal medicine specialists: 959
Family physicians: 276

There are 103 primary care groups in Maine with a Medicare PAC ID: 42 internal medicine, 36 family medicine and 23 nurse practitioner. MaineHealth Primary Care - Family Medicine - Portland is the largest internal medicine group, with 467 internal medicine specialists, and Martin's Point Health Care the largest family medicine group, with 68 family physicians.

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MaineHealth Primary Care - Family Medicine - Portland is the largest primary care group in Maine, with 1,712 physicians

Ranked by physicians with a Maine address linked to each group. MaineHealth Pediatric Cancer Care, Blood Disorders and IV Therapy (formerly Maine Children's Cancer Program) is second with 710, and MaineGeneral Health third with 478. 15 Maine groups have 100 or more physicians.

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Primary care groups in Maine, ranked by physicians
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1	MaineHealth Primary Care - Family Medicine - PortlandPortland · 214 sites	Parent on file	1,712	3,472	Decision makers
2	MaineHealth Pediatric Cancer Care, Blood Disorders and IV Therapy (formerly Maine Children's Cancer Program)South Portland · 83 sites	Parent on file	710	1,195	Decision makers
3	MaineGeneral HealthAugusta · 47 sites	Parent on file	478	951	Decision makers
4	Northern Light Eastern Maine Medical CenterBangor · 33 sites	Parent on file	449	868	Decision makers
5	Central Maine Medical CenterLewiston · 24 sites	Parent on file	410	780	Decision makers
6	Rumford HospitalRumford · 3 sites	Parent on file	243	443	Decision makers
7	Bridgton HospitalBridgton · 8 sites	Parent on file	241	455	Decision makers
8	Northern Light Mercy HospitalPortland · 39 sites	Parent on file	208	451	Decision makers
9	St. Mary's Health SystemLewiston · 19 sites	Parent on file	196	350	Decision makers
10	York HospitalYork · 33 sites	Parent on file	151	351	Decision makers
11	MaineHealth Maine Medical Center BiddefordBiddeford · 30 sites	Parent on file	143	249	Decision makers
12	MaineHealth Pen Bay HospitalRockland · 10 sites	Parent on file	133	218	Decision makers
13	InterMed, P.A.South Portland · 11 sites	-	131	270	Decision makers
14	St. Joseph General Surgery and UrologyBangor · 13 sites	Parent on file	115	214	Decision makers
15	Northern Light AR Gould HospitalPresque Isle · 9 sites	Parent on file	105	195	Decision makers
16	Martin's Point Health CarePortland · 19 sites	Parent on file	91	143	Decision makers
17	Northern Light Maine Coast HospitalEllsworth · 7 sites	Parent on file	87	170	Decision makers
18	Redington-Fairview General HospitalSkowhegan · 6 sites	Parent on file	84	140	Decision makers
19	MaineHealth Waldo HospitalBelfast · 9 sites	Parent on file	82	130	Decision makers
20	MaineHealth Stephens HospitalNorway · 5 sites	Parent on file	78	133	Decision makers
21	Northern Light Mayo HospitalDover-Foxcroft · 8 sites	Parent on file	76	141	Decision makers
22	Northern Light Sebasticook Valley HospitalPittsfield · 5 sites	Parent on file	69	135	Decision makers
23	Mount Desert Island HospitalBar Harbor · 9 sites	Parent on file	68	107	Decision makers
24	Northern Light Blue Hill HospitalBlue Hill · 4 sites	Parent on file	66	120	Decision makers
25	Swift River Family MedicineRumford · 7 sites	Parent on file	60	86	Decision makers
26	Northern Light CA Dean HospitalGreenville · 2 sites	Parent on file	55	98	Decision makers
27	MaineHealth Franklin HospitalFarmington · 7 sites	Parent on file	47	72	Decision makers
28	Penobscot Bay Physicians & AssociatesRockport · 8 sites	Parent on file	46	70	Decision makers
29	Penobscot Valley HospitalLincoln · 3 sites	Parent on file	44	67	Decision makers
30	Northern Maine Medical CenterFort Kent · 4 sites	Parent on file	41	97	Decision makers
31	Northern Light Maine Coast HospitalEllsworth · 6 sites	Parent on file	39	59	Decision makers
32	Pines Health ServicesCaribou · 9 sites	Parent on file	38	75	Decision makers
33	New England Cancer SpecialistsWestbrook · 9 sites	-	37	79	Decision makers
34	Riverview Physical TherapyPortland · 12 sites	-	34	57	Decision makers
35	Chest Medicine AssociatesSouth Portland · 2 sites	-	30	40	Decision makers
36	Greater Portland HealthPortland · 20 sites	Parent on file	28	72	Decision makers
37	Millinocket Regional HospitalMillinocket · 2 sites	Parent on file	26	47	Decision makers
38	NES HealthBangor · 10 sites	Parent on file	22	26	Decision makers
39	Mt. Abram Regional Health CenterKingfield · 13 sites	Parent on file	17	96	Decision makers
40	University HealthcareBiddeford · 5 sites	Parent on file	17	30	Decision makers
41	Portland Gastroenterology CenterPortland · 2 sites	-	17	29	Decision makers
42	Calais Community HospitalCalais · 5 sites	Parent on file	13	26	Decision makers
43	Maine Medical ConsultantsFalmouth · 13 sites	-	12	30	Decision makers
44	Pai Participant 7 PCFalmouth · 7 sites	-	9	27	Decision makers
45	Bucksport Regional Health CenterBucksport · 3 sites	Parent on file	8	40	Decision makers
46	DFD Russell Medical CentersLeeds · 4 sites	Parent on file	6	16	Decision makers
47	AFC Urgent Care South PortlandSouth Portland · 5 sites	Parent on file	5	21	Decision makers
48	Eastport Health Care, Inc.Eastport · 2 sites	Parent on file	5	21	Decision makers
49	BThere HealthcareTopsham · 4 sites	-	5	13	Decision makers
50	Nephrology Associates of Central MaineLewiston · 1 site	-	5	7	Decision makers

Showing 1 to 10 of 103 primary care groups in Maine

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

MaineHealth Primary Care - Family Medicine - Portland is the largest internal medicine group in Maine, with 467 internal medicine specialists

Ranked by internal medicine specialists with a Maine address linked to each group whose main sub-specialty is internal medicine. MaineHealth Pediatric Cancer Care, Blood Disorders and IV Therapy (formerly Maine Children's Cancer Program) is second with 255, and Northern Light Eastern Maine Medical Center third with 125.

Largest internal medicine groups in Maine
#	Medical group	Parent organization	Internal medicine specialists	HCPs
1	MaineHealth Primary Care - Family Medicine - PortlandPortland · 214 sites	Parent on file	467	3,472
2	MaineHealth Pediatric Cancer Care, Blood Disorders and IV Therapy (formerly Maine Children's Cancer Program)South Portland · 83 sites	Parent on file	255	1,195
3	Northern Light Eastern Maine Medical CenterBangor · 33 sites	Parent on file	125	868
4	Central Maine Medical CenterLewiston · 24 sites	Parent on file	96	780
5	MaineGeneral HealthAugusta · 47 sites	Parent on file	93	951
6	St. Mary's Health SystemLewiston · 19 sites	Parent on file	80	350
7	Northern Light Mercy HospitalPortland · 39 sites	Parent on file	80	451
8	Rumford HospitalRumford · 3 sites	Parent on file	70	443
9	Bridgton HospitalBridgton · 8 sites	Parent on file	62	455
10	St. Joseph General Surgery and UrologyBangor · 13 sites	Parent on file	39	214

Top 10 of 42 Maine internal medicine groups

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

Martin's Point Health Care is the largest family medicine group in Maine, with 68 family physicians

Ranked by family physicians with a Maine address linked to each group whose main sub-specialty is family medicine. InterMed, P.A. is second with 41, and Swift River Family Medicine third with 34.

Largest family medicine groups in Maine
#	Medical group	Parent organization	Family physicians	HCPs
1	Martin's Point Health CarePortland · 19 sites	Parent on file	68	143
2	InterMed, P.A.South Portland · 11 sites	-	41	270
3	Swift River Family MedicineRumford · 7 sites	Parent on file	34	86
4	MaineHealth Waldo HospitalBelfast · 9 sites	Parent on file	22	130
5	Riverview Physical TherapyPortland · 12 sites	-	18	57
6	Northern Maine Medical CenterFort Kent · 4 sites	Parent on file	16	97
7	University HealthcareBiddeford · 5 sites	Parent on file	14	30
8	MaineHealth Franklin HospitalFarmington · 7 sites	Parent on file	14	72
9	Mt. Abram Regional Health CenterKingfield · 13 sites	Parent on file	13	96
10	Greater Portland HealthPortland · 20 sites	Parent on file	11	72

Top 10 of 36 Maine family medicine groups

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

Acadia Psychiatry and Gray Urgent Care have the most nurse practitioner specialists of any Maine nurse practitioner group, with 7 each

Ranked by nurse practitioner specialists with a Maine address linked to each group whose main sub-specialty is nurse practitioner. Central Aroostook Psychiatric Services (CAPS) is third with 4. Nine of the ten are independent.

Largest nurse practitioner groups in Maine
#	Medical group	Parent organization	Nurse practitioner specialists	HCPs
1	Acadia PsychiatryMount Desert · 2 sites	-	7	7
2	Gray Urgent CareGray · 2 sites	Parent on file	7	10
3	Central Aroostook Psychiatric Services (CAPS)Presque Isle · 2 sites	-	4	4
4	Seaside Family HealthcareOld Orchard Beach · 1 site	-	3	3
5	Saco Bay Mental HealthScarborough · 1 site	-	3	3
6	Evergreen Senior Healthcare of MaineAugusta · 1 site	-	3	3
7	Navigating Wellness Primary CareBangor · 2 sites	-	3	3
8	Village Family Health CareYork · 2 sites	-	3	4
9	Left Bank Recovery ServicesLewiston · 1 site	-	3	3
10	Maine Comprehensive Pain ManagementScarborough · 1 site	-	3	4

Top 10 of 23 Maine nurse practitioner groups

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

MaineHealth has the most physicians in Maine primary care groups, with 1,977 across 10 groups

Dmand AI maps every medical group to its parent organization, up to the health system or platform at the top. 4 parent organizations have two or more Maine primary care groups. Among health systems, Northern Light Health has the most groups, 11. Each clinician counts once per parent organization.

Parent organizations with the most Maine primary care groups
#	Parent organization	Maine groups	Physicians	HCPs
1	MaineHealthHealth system	10	1,977	4,013
2	Northern Light HealthHealth system	11	870	1,717
3	Prime Healthcare ServicesHealth system	4	433	854
4	Covenant HealthHealth system	2	307	557

Parent organizations with two or more Maine groups

MaineHealthHealth system · 10 Maine primary care groups
MaineHealth Primary Care - Family Medicine - PortlandMulti-specialty group · Portland
MaineHealth Pediatric Cancer Care, Blood Disorders and IV Therapy (formerly Maine Children's Cancer Program)Multi-specialty group · South Portland
8 more Maine groups and their practice sites

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Source: Dmand AI Org Hierarchy Data

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48% of Maine primary care groups are independent, with no larger parent organization

A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.

Maine primary care groups by ownership

Independent4948%
Health system or hospital3534%
Platform or corporate owner55%
Community or government1111%
Other organization33%

Sites of care beyond their own offices

Practice at a hospital43

Practice at an FQHC19

Practice at a rural health clinic16

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Source: Dmand AI Org Hierarchy Data

43 Maine primary care groups practice at a hospital site, and 19 at an FQHC

Sites of care linked to each group in the org hierarchy, beyond its own offices. A group can practice at several kinds of site.

Clinicians in Maine primary care groups

Internal medicine specialists959

Family physicians276

Nurse practitioner specialists59

All HCPs7,907

Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data

South Portland has the most primary care groups in Maine, with 10

10primary care groups in South Portland

8primary care groups in Bangor

8primary care groups in Portland

6primary care groups in Augusta

4primary care groups in Biddeford

4primary care groups in Lewiston

More Maine cities with primary care groups

Scarborough4
Falmouth3
Presque Isle3
Ellsworth2
Rockland2
Rockport2
Rumford2
Skowhegan2
York2
Auburn1
Bar Harbor1
Belfast1
Blue Hill1
Bridgton1
Brunswick1

Source: Doctors and Clinicians National Downloadable File (CMS)

Each Maine primary care group profile shows the parent, sites, clinicians and identifiers

Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
Parent organizationThe health system, platform or owner above the groupOn every profile
Every clinician and siteThe full roster and every practice locationWith a free account
Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account

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Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data

Sources for the Maine primary care group list

Sources for the data on this page
Data on this page	Source
Medical groups, specialties and sites	Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data
Parent organizations and independence	Dmand AI Org Hierarchy Data
Physicians and HCPs	Dmand AI Affiliation Data
Group NPI and PAC ID	NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS)

Data last refreshed October 2026Report an inaccuracy Remove my information

Groups whose main specialty is primary care and that have a Medicare PAC ID.

FAQ

Frequently asked questions about primary care groups in Maine

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is the largest internal medicine group in Maine?

MaineHealth Primary Care - Family Medicine - Portland, based in Portland, with 467 internal medicine specialists and 3,472 HCPs. MaineHealth Pediatric Cancer Care, Blood Disorders and IV Therapy (formerly Maine Children's Cancer Program) is second with 255.

What is the largest family medicine group in Maine?

Martin's Point Health Care, based in Portland, with 68 family physicians and 143 HCPs. InterMed, P.A. is second with 41.

How many primary care groups are in Maine?

There are 103 primary care groups in Maine with a Medicare PAC ID: 42 internal medicine, 36 family medicine and 23 nurse practitioner. Between them they have 959 internal medicine specialists, 276 family physicians and 59 nurse practitioner specialists.

Which companies own the most primary care groups?

By physicians, MaineHealth, with 1,977 across 10 groups, followed by Northern Light Health with 870 and Prime Healthcare Services with 433.

How many Maine primary care groups are independent?

49, or 48%, have no larger parent organization in the Dmand AI org hierarchy. 35 belong to a health system or hospital and 5 to a physician platform or corporate owner.

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Largest primary care groups in Maine

MaineHealth Primary Care - Family Medicine - Portland is the largest primary care group in Maine, with 1,712 physicians

MaineHealth Primary Care - Family Medicine - Portland is the largest internal medicine group in Maine, with 467 internal medicine specialists

Martin's Point Health Care is the largest family medicine group in Maine, with 68 family physicians

Acadia Psychiatry and Gray Urgent Care have the most nurse practitioner specialists of any Maine nurse practitioner group, with 7 each

MaineHealth has the most physicians in Maine primary care groups, with 1,977 across 10 groups

48% of Maine primary care groups are independent, with no larger parent organization

Maine primary care groups by ownership

Sites of care beyond their own offices

43 Maine primary care groups practice at a hospital site, and 19 at an FQHC

Maine primary care groups by site of care

Clinicians in Maine primary care groups

South Portland has the most primary care groups in Maine, with 10

More Maine cities with primary care groups

Each Maine primary care group profile shows the parent, sites, clinicians and identifiers

Sources for the Maine primary care group list

Frequently asked questions about primary care groups in Maine

What is the largest internal medicine group in Maine?

What is the largest family medicine group in Maine?

How many primary care groups are in Maine?

Which companies own the most primary care groups?

How many Maine primary care groups are independent?

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