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 31 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. Breanna HernandezBehavior Technician1972479384
  2. Erika HernandezMarriage & Family Therapist1902398894
  3. Fidelina HernandezBehavior Analyst1598253809
  4. Helen HernandezBehavior Technician1225507155
  5. Ivonne Estefanie HernandezPeer Specialist1598558793
  6. Jocelyn HernandezBehavior Technician1689137820
  7. Kelsey HernandezPhysical Therapist1326556531
  8. Ligia HernandezCounselor1114454402
  9. Lorena Hernandez, PSYDPsychologist1841694056
  10. Maria Hernandez, LMFTMarriage & Family Therapist1578748562
  11. Monica Hernandez, RNRegistered Nurse1427237825
  12. Sidney HernandezBehavior Technician1366946097
  13. Maria Hernandez AvilaBehavior Technician1245944529
  14. Stephanie Hernandez MarquezMental Health Counselor1396152716
  15. Liliana Hernandez RodriguezBehavior Technician1871313601
  16. Rachel Hernandez-MedranoSchool Counselor1952283343
  17. Kyna HernandoBehavior Technician1326619339
  18. Virginia Hernly, DC, CCSPSports Physician Chiropractor1467471151
  19. Alex HerreraCommunity Health Worker1730311812
  20. Elia HerreraCommunity Health Worker1386876464
  21. Emily HerreraBehavior Technician1316598881
  22. Jorge Herrera, RADTAddiction (Substance Use Disorder) Counselor1013760511
  23. Lilia HerreraCommunity Health Worker1104136191
  24. Ramona HerreraBehavior Technician1437799442
  25. Jasmin Herrera BarrigaBehavior Technician1427909332
  26. Camella Herrmann-YoshidaAddiction (Substance Use Disorder) Counselor1447973789
  27. Neil Hersh, PH.D.Clinical Psychologist1023448099
  28. Philip HershonCase Manager/Care Coordinator1215485487
  29. Glenn Herskowitz, PHARMPharmacist1871964569
  30. Barbara HerzStudent in an Organized Health Care Education/Training Program1306033592
  31. Susanne Herz, MD, MSPediatrics Physician1710019369
  32. Karen Herzig, ODOptometrist1649964909
  33. Shelley Hesler, LCSWClinical Social Worker1124143250
  34. Meghan Hession, MDDermatology Physician1548546971
  35. John HesslUrology Physician1235215971
  36. Kendra HesterBehavior Technician1013561174
  37. Lindy Hewitt, LINDY HEWITT MFTMental Health Counselor1750420923
  38. Catherine HickeyPhysician Assistant1598232134
  39. Courtney Hicks, RBTBehavior Technician1457947152
  40. Milagros HidalgoBehavior Technician1861347197
  41. Susie HidayatPsychologist1538027289
  42. Ross HigerdCounselor1760521884
  43. Derrick HigginsBehavior Analyst1881254316
  44. Mark HighmanCardiovascular Disease Physician1962583195
  45. Angelica HilarioBehavior Technician1770174401
  46. Diana HillProfessional Counselor1609123777
  47. Aimee Hilliard, M.A. COUNSELINGMarriage & Family Therapist1952421323
  48. Freida Hilts, PHD, LEPMental Health Counselor1588890289
  49. Rommel Hindocha, D.C.Chiropractor1114944154
  50. Ernesto Hipolito, MDFamily Medicine Physician1902967342

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.