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 30 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. Samantha Harper-AlvarezPeer Specialist1699667824
  2. Jasmine HarrisBehavior Technician1629605951
  3. Charlene HartMassage Therapist1497496657
  4. Rosemary HartMental Health Counselor1346672839
  5. Donna HartmanChiropractor1487861100
  6. Sarah HartmanBehavior Technician1609573971
  7. Kelsey HarvillBehavior Technician1245951573
  8. Zahiyah Hasan, MSN, FNPFamily Nurse Practitioner1851936892
  9. Christopher Haselton, DPTPhysical Therapist1205209145
  10. Jessica HaskinBehavior Technician1629839758
  11. Miranda Haskins, D.O.Hospitalist Physician1396005542
  12. Grace Hassid, MDInternal Medicine Physician1700957099
  13. Steven Hassid, MDCardiovascular Disease Physician1528132248
  14. Molly HasslerBehavior Technician1285404335
  15. Kurosch Hatami, D.D.S.General Practice Dentistry1245370287
  16. Giana Hatem, AU.D.Audiologist1659267466
  17. Kristin Hatten, DPTPediatric Physical Therapist1174858682
  18. Cathy Hauer, MS, MFTMarriage & Family Therapist1851539811
  19. Catherine Haueter, MA, LMFTMental Health Counselor1083022487
  20. Teesha HavenClinical Social Worker1609439769
  21. Rebecca Hawkins, ACSWClinical Social Worker1295022317
  22. David Hayashi, D.D.S.Dentist1437594595
  23. Rosanne HayesBehavior Technician1912740622
  24. Lynne Haynes-Tucker, MDPsychiatry Physician1689737157
  25. Allen Haysbert, C.A.T.C.Addiction (Substance Use Disorder) Counselor1477840890
  26. Paul Hazelrig, M.D.Specialist1477568061
  27. Kelsea HazlehurstPhysical Therapist1548704349
  28. Marcia HeadleyCase Manager/Care Coordinator1023203742
  29. Ronda HealyBehavior Technician1700752417
  30. Colleen Mae HebreoBehavior Technician1972441772
  31. Cindy HedlinMarriage & Family Therapist1609412865
  32. Riley HeffronCommunity Health Worker1831819069
  33. Joseph HeilmannMental Health Counselor1902389190
  34. Anne HeinrichCase Manager/Care Coordinator1215376736
  35. Janine Heisler, MFTMarriage & Family Therapist1801159678
  36. Kristina Heisser, MAMarriage & Family Therapist1982374252
  37. Gail Held, PHARMDPharmacist1205136108
  38. Alexandra HeleniusMarriage & Family Therapist1033571237
  39. Phoenix HemesiBehavior Technician1144948050
  40. Brian Henderson, M.D.Hematology & Oncology Physician1497846901
  41. Molly HenricksMarriage & Family Therapist1154588655
  42. Anie HerBehavior Technician1629534029
  43. Candace Herb, NPFamily Nurse Practitioner1639904048
  44. Lena HerbertDay Training/Habilitation Specialist1942196829
  45. Shubhada HerlekarMarriage & Family Therapist1831935790
  46. Ashley HermawanBehavior Technician1386518751
  47. Sophia HermosillaBehavior Technician1679461289
  48. Andrea Hermosillo-Hahn, D.P.T.Physical Therapist1871771428
  49. Ameyali HernandezBehavior Technician1629866082
  50. Anna HernandezAddiction (Substance Use Disorder) Counselor1033572367

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.