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 46 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. Viviana MartinezBehavior Technician1316579790
  2. William Martinez JrBehavior Technician1578275533
  3. Lorelie Shalaine Martir, RNRegistered Nurse1174374490
  4. Nancy Marx, PH.D.Psychologist1700835923
  5. Kevin Masek, M.D.Emergency Medicine Physician1811280563
  6. Zahida Maskatia, M.D.Allergy & Immunology (Internal Medicine) Physician1134364250
  7. Martha Maslan, MA, MFTMarriage & Family Therapist1073650503
  8. Amber MasonBehavior Technician1982245445
  9. Cassandra Mason, D.C.Chiropractor1942437553
  10. Joy Mason, P.T.A., A.T.C.Athletic Trainer1346290616
  11. Vincent Mason, MDPediatrics Physician1669548681
  12. Quiara MataeleMental Health Counselor1265132948
  13. Diamond MatautiaAddiction (Substance Use Disorder) Counselor1497228373
  14. Catherine MathewsMarriage & Family Therapist1205393899
  15. Zara Mathews, M.D.Emergency Medicine Physician1124300652
  16. Jaqueline Mathiesen, SUD COUNSELORAddiction (Substance Use Disorder) Counselor1972360899
  17. Anna MatkowskiPeer Specialist1306220173
  18. Vea MaumalangaCommunity Health Worker1972202653
  19. Zaw Maung, MD, MPHOccupational Medicine Physician1508274424
  20. Stefania Maurtua MoralesHealth & Wellness Coach1386211068
  21. Alexandra MayClinical Social Worker1811201585
  22. Nadin Mayblum-Boaz, M.A., MFTMarriage & Family Therapist1346637345
  23. Amy Mayo, MFTCase Manager/Care Coordinator1588710453
  24. Zulma Mayorga, MSWMental Health Counselor1508118605
  25. Sonia Mays, LCSWClinical Social Worker1003169954
  26. Majd MazahrehDriver1578405718
  27. Gina MazzettiMarriage & Family Therapist1770046609
  28. Bridget McAllister, MS, CCC-SLPSpeech-Language Pathologist1366848590
  29. Jason McArthur, AMFTMarriage & Family Therapist1699659789
  30. Amy McCarthySpeech-Language Pathologist1215395090
  31. Michael McCartyAddiction (Substance Use Disorder) Counselor1467710780
  32. Kathleen McConnell, CMTMassage Therapist1386135085
  33. Jesse McCormackPediatric Occupational Therapist1689092934
  34. Kristin McCormickMental Health Counselor1770827198
  35. Michael McCormick, C.A.T.C. 11Addiction (Substance Use Disorder) Counselor1225295074
  36. Kelly McCoyCommunity Health Worker1104965060
  37. Judy McCrary-KoeppenSpeech-Language Pathologist1225562168
  38. Kashanti McCullarBehavior Technician1811779192
  39. Adam McCulloughBehavior Technician1326764416
  40. Kennon McDonough, PSY.D.Psychologist1225326051
  41. Bridget McElligottMental Health Counselor1790336980
  42. Kimberly McGarvey, MFCMarriage & Family Therapist1346469988
  43. Melissa McGeeBehavior Technician1700576907
  44. Megann McGinnis, DOPsychiatry Physician1669223251
  45. Jocelyn McGriff, LCSWClinical Social Worker1730516618
  46. Rob McIlvoyMental Health Counselor1407308539
  47. Michelle McIlwainFamily Nurse Practitioner1669325882
  48. Breanna McIntyreBehavior Technician1265028427
  49. David McIntyre, PH.D.Clinical Psychologist1063436095
  50. Natalie McKayMarriage & Family Therapist1881544468

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.