Massachusetts NPI Registry — Provider Lookup

Look up NPI numbers for healthcare providers in Massachusetts. Our latest NPPES snapshot includes 255,247 active providers and organizations with a practice location in Massachusetts, searchable by name, specialty, and city.

Top specialties in Massachusetts

Counselor in MA (31,620)
Social Worker in MA (24,605)
Nurse Practitioner in MA (15,627)
Internal Medicine in MA (14,186)
Dentist in MA (12,173)
Student in an Organized Health Care Education/Training Program in MA (11,669)
Behavior Technician in MA (10,809)
Physical Therapist in MA (8,261)
Registered Nurse in MA (7,886)
Psychologist in MA (7,520)
Pharmacist in MA (6,595)
Physician Assistant in MA (6,064)
Clinic/Center in MA (5,336)
Developmental Therapist in MA (5,216)
Behavior Analyst in MA (5,020)
Psychiatry & Neurology in MA (4,966)
Pediatrics in MA (4,423)
Occupational Therapist in MA (4,400)
Speech-Language Pathologist in MA (4,214)
Family Medicine in MA (2,869)
Chiropractor in MA (2,719)
Dietitian, Registered in MA (2,649)
Anesthesiology in MA (2,489)
Radiology in MA (2,381)
Optometrist in MA (2,215)
Home Health in MA (2,064)
Case Manager/Care Coordinator in MA (2,046)
Emergency Medicine in MA (2,013)
Obstetrics & Gynecology in MA (1,771)
Pharmacy in MA (1,675)

Browse by city

Boston, MA (44,026)
Worcester, MA (14,441)
Springfield, MA (9,350)
Cambridge, MA (5,745)
Brockton, MA (4,946)
Milford, MA (3,638)
Fall River, MA (3,532)
Framingham, MA (3,523)
Lowell, MA (3,426)
Marlborough, MA (3,320)
Newton, MA (3,302)
Quincy, MA (3,217)
Brookline, MA (2,843)
Burlington, MA (2,793)
Lawrence, MA (2,625)
Pittsfield, MA (2,581)
New Bedford, MA (2,574)
Beverly, MA (2,531)
Waltham, MA (2,529)
Plymouth, MA (2,349)
Danvers, MA (2,336)
Lynn, MA (2,319)
Woburn, MA (2,189)
Holyoke, MA (2,173)
Salem, MA (2,128)
Somerville, MA (2,123)
Northampton, MA (2,097)
Dorchester, MA (1,975)
Brighton, MA (1,866)
Taunton, MA (1,824)
Jamaica Plain, MA (1,805)
Hyannis, MA (1,723)
Lexington, MA (1,693)
Peabody, MA (1,641)
Norwood, MA (1,520)
Needham, MA (1,470)
Attleboro, MA (1,452)
Leominster, MA (1,442)
Haverhill, MA (1,438)
West Springfield, MA (1,407)

Frequently asked questions

How do I look up an NPI number in Massachusetts?

Use the NPI search and select MA, or browse the specialty and city directories on this page. Every provider profile shows the NPI, taxonomy, practice address, and status.

How many healthcare providers are registered in Massachusetts?

Our latest NPPES snapshot lists 255,247 active providers and organizations with a practice location in Massachusetts.

Is this the official Massachusetts NPI registry?

No — NPI numbers are issued federally by CMS, not by states. This is a private directory built on the public CMS NPPES data file; the official registry is npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-09.