NPPES file of Aug 9, 2026

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 71 of 103.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

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

  1. Jason Oppenheim, PSY.D.Clinical Psychologist1851549539
  2. Barbara Opray, MDAdolescent Medicine (Internal Medicine) Physician1639142490
  3. Christie OrcuttBehavior Analyst1255801940
  4. Maria Ordonez, MDUrology Physician1053577197
  5. John OrellanaPharmacist1295560332
  6. Alan Ornstein, LCSWMental Health Counselor1962557280
  7. Miriam Lilla Ornstein, M.D.Psychiatry Physician1104873892
  8. Claudia OrozcoMental Health Counselor1174473979
  9. Megan Orr, LICSWClinical Social Worker1639324643
  10. David Ortega, PSY.D.Clinical Psychologist1780703736
  11. Elizabeth Orth, NDNaturopath1407197759
  12. Ashley OrtizPharmacy Technician1427895077
  13. Michele Ortiz, RPHPharmacist1669760765
  14. Liliane OrtolanMental Health Counselor1851867972
  15. Marie Osborn, RNRegistered Nurse1861834731
  16. Janet OseiRegistered Nurse1740855725
  17. Samuel Osher, MDInternal Medicine Physician1174636112
  18. Amira Osman-Short, MD, MSCStudent in an Organized Health Care Education/Training Program1083416226
  19. Valerie Ososky, CNMAdvanced Practice Midwife1396836508
  20. Anna Ost, NPAdult Health Nurse Practitioner1649689878
  21. Nicolai Ostberg, MDInternal Medicine Physician1518714583
  22. Louis OstrowskyPsychiatry Physician1306135082
  23. Ariel Otero, M.D.Psychiatry Physician1295953867
  24. Linda OteroSocial Worker1770849713
  25. Debbie OtooleBehavior Technician1134774854
  26. Anna Rose Ott, LCSWClinical Social Worker1043915044
  27. Colleen OttoMental Health Counselor1316784101
  28. Loretta OuellettFamily Nurse Practitioner1053787895
  29. Doreen Oughton, LMHCMental Health Counselor1326111014
  30. Renee Outland, OTD, OTR/LMental Health Occupational Therapist1629564513
  31. Mesa OutlawRegistered Nurse1013508431
  32. Ashley Own, PHARMDPharmacist1649155953
  33. Anna Ozonoff, LICSWClinical Social Worker1891077749
  34. Berkcan Ozturk, MDInternal Medicine Physician1558156000
  35. Lauren Paap, ACUPUNCTURISTAcupuncturist1851926117
  36. Pamela Pacelli, M.A.Mental Health Counselor1134277643
  37. Eva PaddockCounselor1255602520
  38. Elena Padilla Garza, RDRegistered Dietitian1194594689
  39. Sophia PadnosClinical Social Worker1235898347
  40. Marta Pagan-Ortiz, MSStudent in an Organized Health Care Education/Training Program1619228442
  41. Jennifer Page, PH.D.Psychologist1932250784
  42. Shira Page, NPAdult Health Nurse Practitioner1932584174
  43. Stephanie Page, MDInternal Medicine Physician1649236100
  44. Natalie PaicopolisClinical Social Worker1477417178
  45. Theresa Palabrica, M.D.Cardiovascular Disease Physician1225076508
  46. Stephanie Palacios, MFT, PSYD CANDIDATEStudent in an Organized Health Care Education/Training Program1164047965
  47. Virginia Palazzo, M.D.Internal Medicine Physician1053309682
  48. Abbie Paley, NPFamily Nurse Practitioner1710478854
  49. Linda Palladino, LICSWProfessional Counselor1073641627
  50. Cally PalmieriRegistered Nurse1811668247

The largest Massachusetts cities

  1. Boston41,865
  2. Worcester13,166
  3. Springfield8,553
  4. Brockton4,287
  5. Milford3,459

All of Massachusetts →

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.