Doctors and health care providers in Cambridge, MA
5,145 individual NPPES records list a practice address in Cambridge, 4th of 406 Massachusetts cities. The largest group is clinical social worker: 545, 11% of the city's records, against 8% across Massachusetts. Page 70 of 103.
The 8 largest groups in Cambridge
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Cambridge in Massachusetts
- Rank in Massachusetts4th of 406 cities by records
- Share of the state2.3% of Massachusetts's records
- Specialties present25 or more taxonomy codes
- Top three groups22.6% of all records
- Clinical Social Worker rank4th of the 10 Massachusetts cities with the most
Compared with Massachusetts as a whole, Cambridge has 4.1× the state's share of advanced practice midwife records and 0.56× its share of speech-language pathologist records.
Providers in Cambridge, alphabetically
- Alexandra O'Brien-Dukes, LMHCMental Health Counselor1952950420
- Denise O'Connor, RN,MS,OCNOncology Registered Nurse1356549034
- Robert O'Connor, M.D.Internal Medicine Physician1669768164
- Dylan O'DellBehavior Technician1982278495
- Amanda O'Donnell, DONephrology Physician1356839328
- Ryan O'Donnell, PT, DPTNeurology Physical Therapist1588540025
- Megan O'HaraSocial Worker1093123606
- Devin O'Hare, CCC-SLPSpeech-Language Pathologist1821659020
- Robert O'LoughlinSocial Worker1336519339
- Barbara O'Neil, M.D.Internal Medicine Physician1275565335
- Elizabeth O'Neil, CNPFamily Nurse Practitioner1811416563
- Heather O'Neill, MS, OTR/LOccupational Therapist1548594609
- Siobhan O'Neill, M.D.Psychiatry Physician1073571915
- Sarah O'ReillyOrthopedic Physical Therapist1952939357
- Michael O'Rourke, PA-CPhysician Assistant1629528435
- Olivia O'Shea, AGNP-CAdult Health Nurse Practitioner1114805116
- Kathryn Oas, AGNPPrimary Care Nurse Practitioner1184181380
- Jennifer ObeahonRegistered Nurse1821584434
- Dita Obler, MS, CGCGenetic Counselor (M.S.)1215994488
- Jennifer Obrien, PH.D.Psychologist1326607680
- Lynette Obrien, RN, OCN, BSNRegistered Nurse1164629960
- Ingrid ObsuthPsychologist1952566044
- Marissa OconnorCertified Registered Nurse Anesthetist1497271662
- Molly OconnorClinical Social Worker1508205303
- Marie OgandoRegistered Nurse1124508650
- Gianna Ogletree, RNRegistered Nurse1356222590
- Barbara Ogur, MDInternal Medicine Physician1356408751
- Jacqueline OhmuraStudent in an Organized Health Care Education/Training Program1164125563
- Andre Ohta GementeRegistered Nurse1720800295
- Abram Ojure, LIC.AC., DIPL. OMAcupuncturist1023316650
- Unoma Okoli, MBBSInternal Medicine Physician1952983306
- Kori Oladunjoye, PHARMDPharmacist1679423636
- Jane OldhamSocial Worker1265150932
- Jacqueline Olds, MDPsychiatry Physician1336139054
- Zachary Oliff, DOEmergency Medicine Physician1003300492
- Christine Oliver, LICSWSocial Worker1245453075
- Phoebe Oliverio, PHARM.D.Pharmacist1669831624
- Hannah Olivet, MDInternal Medicine Physician1750580197
- Alexandra OlivoRegistered Nurse1114563574
- Elizabeth OlsonClinical Social Worker1225513120
- Erin Omalley, CRNACertified Registered Nurse Anesthetist1467526111
- Joseph Omlor, MDInternal Medicine Physician1124432869
- Fernando Ona, PHD, MPHSocial Worker1982042784
- Alison Oneill, MDNeurology Physician1194715771
- Marla Onishi, MDFamily Medicine Physician1528071883
- Anthony Onorato, R.PH.Pharmacist1003940644
- Chibuikem OnwuoguAssistant Behavior Analyst1043196694
- Ebere OnyeadorAmbulatory Care Registered Nurse1770284838
- Adarema OparaPharmacist1861145476
- Frank Oppenheim, D.M.D., PH.D.Periodontics1770770422
The largest Massachusetts cities
- Boston41,865
- Worcester13,166
- Springfield8,553
- Brockton4,287
- Milford3,459
How to read this directory
Cambridge, Massachusetts appears in the CMS National Plan and Provider Enumeration System with 5,145 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Cambridge - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Cambridge practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.
The provider mix in Cambridge is weighted toward Clinical Social Worker (545 clinicians, followed by Student in an Organized Health Care Education/Training Program with 319 and Internal Medicine Physician with 300). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Massachusetts's population, Cambridge reports roughly 73.5 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.
Of Massachusetts's most common specialties, Behavior Technician is the most prominent one with no provider currently listing a Cambridge practice address, a coverage gap Cambridge patients typically fill by traveling to a larger nearby hub.
For Cambridge patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.
For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.
Common questions
How many doctors are in Cambridge, MA?
There are 5,145 registered healthcare providers in Cambridge, MA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Cambridge?
The most common specialties in Cambridge are Clinical Social Worker, Student in an Organized Health Care Education/Training Program, Internal Medicine Physician, Mental Health Counselor, Social Worker. Clinical Social Worker has the most providers with 545.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.