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 28 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. David GradyCounselor1457584658
  2. Elizabeth GradyPediatrics Physician1578634820
  3. Alexander Graf, DPTPhysical Therapist1902340144
  4. Roger Graham, D.D.S.General Practice Dentistry1740301274
  5. Sundeep Grandhe, MD, HMDC, FAAHPMHospice and Palliative Medicine (Internal Medicine) Physician1689101578
  6. Marite GrandovskisClinical Psychologist1154721488
  7. Alan Grant, DDSGeneral Practice Dentistry1235853193
  8. Brandon GranzellaBehavior Technician1033613088
  9. Samara Graunke, DODoula1750189486
  10. Michelle Graville, LMFTMarriage & Family Therapist1265575211
  11. Richard Gravina, MDNeurology Physician1235217605
  12. Donna Gray, M.S. CCC-SLPSpeech-Language Pathologist1689932477
  13. Kimberly GrayStudent in an Organized Health Care Education/Training Program1407230667
  14. Elizabeth Green, PSY.D.Clinical Psychologist1982226387
  15. Peter GreenMarriage & Family Therapist1558938050
  16. Tiahna GreenBehavior Analyst1558862235
  17. Melissa GreenfieldAddiction (Substance Use Disorder) Counselor1194363390
  18. Estelle Gregory, MDPsychiatry Physician1669665949
  19. Richard Gregory, DDSGeneral Practice Dentistry1356382626
  20. Catherine Grellas, RN, MFT INTERNMental Health Counselor1730475021
  21. Tatiana GrelliAddiction (Substance Use Disorder) Counselor1255792669
  22. Laura Grgich, RNEmergency Registered Nurse1780265231
  23. Tobie GriersonSpeech-Language Pathologist1558044602
  24. John Griffin, M.D.Plastic and Reconstructive Surgery Physician1114933827
  25. Michael Griffin, MDPediatric Cardiology Physician1073543914
  26. Aisha GriffithBehavior Technician1528937356
  27. Benjamin Griggs, M.D.Child & Adolescent Psychiatry Physician1245258219
  28. Gloria GrossMarriage & Family Therapist1114041647
  29. Erika GrosserBehavior Technician1609351014
  30. Arie GrossmanHealth Educator1063027423
  31. Wilma Growney, MFTTMarriage & Family Therapist1720754765
  32. Richard Grunert, CACT 2215167-2Day Training/Habilitation Specialist1023646981
  33. Jose GuadalupeAddiction (Substance Use Disorder) Counselor1548703101
  34. Marta Guandique, M.S.Marriage & Family Therapist1437434081
  35. Adrian GuardadoClinical Exercise Physiologist1043800188
  36. Guadalupe GudinoBehavior Technician1457229791
  37. Omar Gudino, PH.D., ABPPClinical Child & Adolescent Psychologist1699899674
  38. Diana GuerraNutritionist1255283685
  39. Angelique GuerreroBehavior Technician1356817506
  40. Moises GuerreroAddiction (Substance Use Disorder) Counselor1649405135
  41. Shayndel GuerreroBehavior Technician1487534608
  42. Yesenia GuerreroMental Health Counselor1073067153
  43. Jennifer Guerrettaz, IMFMarriage & Family Therapist1134471881
  44. Annelys GuisasolaMarriage & Family Therapist1447374814
  45. Brittney Guitron, LVNLicensed Vocational Nurse1083186019
  46. Tania Guizar BastidasBehavior Technician1437933447
  47. Danielle GuldmannMental Health Counselor1891197398
  48. Cassandra GunnBehavior Technician1245012269
  49. Qi Guo, L.AC.Acupuncturist1346532959
  50. Bhushan Gupta, M.D.Allergy & Immunology Physician1326010091

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.