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 52 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. Erica NoceraMarriage & Family Therapist1760807655
  2. Laurin Noguchi, NPFamily Medicine Physician1942015623
  3. Valerie NolanRegistered Nurse1427197110
  4. Roza Noorstani KhanBehavior Technician1376492348
  5. Bailey NormanBehavior Technician1649836131
  6. Michael Norris, MDPlastic Surgery Physician1538212741
  7. Barry NortonAssistant Health Information Record Technician1093247652
  8. Daniela Norwood, PT, DPT, MSPhysical Therapist1811505324
  9. Jessica Noryko, MFTIMarriage & Family Therapist1477700615
  10. Matthew Nosich, MSWMental Health Counselor1528477684
  11. Siaka Nuah, BEHAVIOR TECHNICIANBehavior Technician1962218933
  12. Scherwin NublaAddiction (Substance Use Disorder) Counselor1659960391
  13. Sarah NuegaBehavior Technician1750109658
  14. Albert Nuevo, RNRegistered Nurse1073792578
  15. Julia Nunan-Saah, PHDClinical Neuropsychologist1679922322
  16. John NungarayPhysician Assistant1720869647
  17. Makua NwekeBehavior Technician1003772112
  18. Linda NwogaStudent in an Organized Health Care Education/Training Program1578902490
  19. Angela NwokikeBehavior Analyst1962991323
  20. Joel O'Beso, PSY.D.Clinical Psychologist1154566438
  21. James O'Connell, NPPrimary Care Nurse Practitioner1568541951
  22. Sean O'Grady, D.C.Chiropractor1326369224
  23. Shelby O'HaraPhysician Assistant1427762160
  24. Keirsty O'Keeffe, M.A., MFTICase Manager/Care Coordinator1194944116
  25. Madison O'RiellyMarriage & Family Therapist1245922632
  26. Nanami ObaPhysical Therapy Assistant1871951434
  27. Nicolas Oberes-PadreBehavior Technician1972440303
  28. Carson OberstMarriage & Family Therapist1396390985
  29. Lynda ObiBehavior Technician1710451042
  30. Aiza OblepiasBehavior Analyst1700243847
  31. Maricel OcaMental Health Counselor1730588476
  32. Kristine Ocampo, OTOccupational Therapist1548125818
  33. Norma OcampoCommunity Health Worker1104699560
  34. Veronica OceguedaCommunity Health Worker1295967370
  35. Rosamaria OcegueraMarriage & Family Therapist1255457933
  36. Martha OchoaSocial Worker1811445372
  37. Michelle OchoaBehavior Analyst1124558309
  38. Jessica Ochoa ArroyoBehavior Technician1285315895
  39. Christian OdanielAddiction (Substance Use Disorder) Counselor1912728239
  40. Katharine Odle, ACSWMental Health Counselor1912422940
  41. Scott Oesterling, MDObstetrics & Gynecology Physician1457422701
  42. Timothy Offensend, MDInternal Medicine Physician1083667539
  43. Sylvia OfoduStudent in an Organized Health Care Education/Training Program1821763483
  44. Garik Oganesian, DDSGeneral Practice Dentistry1962908319
  45. Obiageli OgbodoBehavior Technician1114597689
  46. James OgdenAddiction (Substance Use Disorder) Counselor1124880299
  47. Ayesha OgunnupeCommunity Health Worker1598198046
  48. Kelly Olcott, AGPCNP-BCNurse Practitioner1538787031
  49. Kim Olenic, MSW, LCSWClinical Social Worker1144655440
  50. Frances Oliden, RNRegistered Nurse1760661169

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.