NPPES file of Aug 9, 2026

Doctors and health care providers in San Mateo, CA

3,909 individual NPPES records list a practice address in San Mateo, 54th of 812 California cities. The largest group is behavior technician: 848, 22% of the city's records, against 18% across California. Page 58 of 79.

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

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

San Mateo in California

  • Rank in California54th of 812 cities by records
  • Share of the state0.4% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups35.7% of all records

Compared with California as a whole, San Mateo has 2.5× the state's share of psychiatry physician records and 0.57× its share of family medicine physician records.

Providers in San Mateo, alphabetically

  1. Talisha Racy, MFTMarriage & Family Therapist1467526384
  2. Lindsay RademacherRehabilitation Chiropractor1982812178
  3. Hansraj RaghunandanElectroneurodiagnostic Specialist/Technologist1356727770
  4. Patricia RaginsCommunity Health Worker1225409360
  5. Nabeela Rahman, M.D.Psychiatry Physician1689855595
  6. Jessica Rahter, MAStudent in an Organized Health Care Education/Training Program1811413271
  7. Harinder Rai, DDSGeneral Practice Dentistry1598305484
  8. Shruti Rajan, MDPsychiatry Physician1992440440
  9. Richard RalphsonMental Health Counselor1982037354
  10. Alondra RamirezBehavior Analyst1083447767
  11. America RamirezBehavior Technician1245166149
  12. Ashley Ramirez, M.A., BCBABehavior Analyst1033505383
  13. Karla Ramirez, LCSWSocial Worker1780932988
  14. Lester RamirezClinical Social Worker1457508616
  15. Mary Ramirez, N.P.Nurse Practitioner1063657906
  16. Nayely Ramirez, MABehavior Technician1538051453
  17. Samantha Ramirez, AU.D.Audiologist1497303499
  18. Sophia RamirezBehavior Technician1861223273
  19. Victoria RamirezInternal Medicine Physician1699821660
  20. Yolanda RamirezPeer Specialist1780077107
  21. Diego Ramirez SanchezCommunity Health Worker1114675436
  22. Carrie RamlowMental Health Counselor1447656509
  23. Alberto Ramos, B.S.Addiction (Substance Use Disorder) Counselor1255672093
  24. Andrew RamosAdult Companion1942964929
  25. Cynthia RamosBehavior Technician1386579902
  26. Deja Ramos, CD(DONA)Doula1144787425
  27. Lorena RamosMedical Physician Assistant1013698034
  28. Marjorie RamosPharmacist1649989559
  29. Patricia Ramos, AMFTMarriage & Family Therapist1114058328
  30. Ross Ramos, RN BSN PHN PHDPsychiatric/Mental Health Registered Nurse1194191387
  31. Beatty Ramsay, MDInternal Medicine Physician1992758478
  32. Seli Rana Magar, APCCMental Health Counselor1396692745
  33. Julie Ann Randall, CMTDoula1982931143
  34. Isabel RangelBehavior Technician1568931616
  35. Farzaneh Raoufi, FNPPrimary Care Nurse Practitioner1710106737
  36. Phraetawan RatchatapongsiriBehavior Technician1205600236
  37. Andrew Rattner, M.S., CCC-SLPSpeech-Language Pathologist1245578160
  38. Bonnie Rattner, MA, MA, ED.DAudiologist1295842813
  39. Ann Rawley, PH.D.Clinical Psychologist1730469198
  40. Madison RayBehavior Technician1164349874
  41. Lisa RaygosaAddiction (Substance Use Disorder) Counselor1326643172
  42. Aki RaymerMental Health Counselor1558511436
  43. Dayna Reader, MFTMarriage & Family Therapist1851867881
  44. Younes Rebbaj, RD/LDRegistered Dietitian1093502536
  45. Bailey ReedBehavior Technician1497426357
  46. Empriss ReedBehavior Technician1760130165
  47. Lashanda Reed, RNRegistered Nurse1831922384
  48. Mark ReedCase Manager/Care Coordinator1770764565
  49. Karmen ReevesBehavior Technician1639908130
  50. Karina RegaladoBehavior Technician1760966527

The largest California cities

  1. Los Angeles69,537
  2. San Diego52,937
  3. San Francisco38,143
  4. Sacramento33,083
  5. San Jose20,925

All of California →

How to read this directory

San Mateo, California appears in the CMS National Plan and Provider Enumeration System with 3,909 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 San Mateo - 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 San Mateo 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 San Mateo is weighted toward Behavior Technician (848 clinicians, followed by Marriage & Family Therapist with 348 and Behavior Analyst with 200). 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 California's population, San Mateo reports roughly 10 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.

For San Mateo 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 San Mateo, CA?

There are 3,909 registered healthcare providers in San Mateo, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in San Mateo?

The most common specialties in San Mateo are Behavior Technician, Marriage & Family Therapist, Behavior Analyst, Mental Health Counselor, Clinical Social Worker. Behavior Technician has the most providers with 848.

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.