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Healthcare providers in Maine: NPI counts by specialty

This page summarizes active National Provider Identifier (NPI) records in the CMS NPPES registry with a practice location in Maine. It reports 41,912 records and shows how many are flagged as sole proprietors, alongside the largest listed specialties. The figures help practice managers, physicians assessing practice options, and analysts understand the composition of the provider registry in this state.

Statewide totals

Active NPI records41,912
Registered sole proprietors9,363 (22.3%)

In Maine, 9,363 records, or 22.3%, are flagged as sole proprietors. This flag is self-reported and is an imperfect proxy for private practice, so it should not be read as a complete count of independently operating practices.

Largest specialties in this state

SpecialtyActive NPIs
Clinical Social Worker3,629
Physical Therapist1,810
Pharmacist1,362
Family Medicine Physician1,342
Occupational Therapist1,342
Mental Health Counselor1,247
Speech-Language Pathologist1,229
Family Nurse Practitioner1,159
Student in an Organized Health Care Education/Training Program1,147
Addiction (Substance Use Disorder) Counselor1,112
Professional Counselor1,019
Physician Assistant988
Internal Medicine Physician820
Registered Nurse704
General Practice Dentistry694
Social Worker634
Chiropractor633
Massage Therapist627
In Home Supportive Care Agency556
Counselor517
Dentist494
Nurse Practitioner473
Dental Hygienist443
Certified Registered Nurse Anesthetist439
Psychiatric/Mental Health Nurse Practitioner437
Emergency Medicine Physician426
Durable Medical Equipment & Medical Supplies426
Optometrist421
Community/Behavioral Health Agency388
Pediatrics Physician361
Psychiatry Physician360
Registered Dietitian360
Specialist352
Local Education Agency (LEA)339
Clinical Psychologist316
Physical Therapy Assistant308
Athletic Trainer296
Psychologist290
Intellectual and/or Developmental Disabilities Community Based Residential Treatment Facility284
Anesthesiology Physician272

Source: CMS National Plan and Provider Enumeration System (NPPES) Data Dissemination file, FOIA-disclosable public data under CMS-6060-N. Aggregated by Hero EMR on 2026-08-03; deactivated NPIs excluded; specialty assigned from the primary taxonomy code (NUCC 25.1). Counts below 11 are suppressed. Individual providers are never published. All provider data pages.

Common questions

What records are included on this page?

The page covers 41,912 active NPI records with a practice location in Maine, based on CMS NPPES data.

Which specialties have the largest numbers of records?

The largest specialties are Clinical Social Worker (3,629), Physical Therapist (1,810), Pharmacist (1,362), Family Medicine Physician (1,342), and Occupational Therapist (1,342).

What does the sole-proprietor share mean?

A total of 9,363 records, or 22.3%, are flagged as sole proprietors. The flag is self-reported and is an imperfect proxy for private practice.

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