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 43 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. Alexia LomeliMental Health Counselor1033035043
  2. Belen LomeliBehavior Analyst1164274064
  3. Erin LondryBehavior Analyst1366212060
  4. Megan LondryBehavior Technician1861254567
  5. Haley LongBehavior Technician1609466416
  6. Samuel LoomisStudent in an Organized Health Care Education/Training Program1922734474
  7. Claudia LopezBehavior Analyst1700324175
  8. Elvia LopezBehavior Technician1144809674
  9. Ivan Lopez, MDPsychiatry Physician1861285488
  10. Jennifer LopezAddiction (Substance Use Disorder) Counselor1073025086
  11. Jose LopezBehavior Technician1447070503
  12. Joshua LopezAddiction (Substance Use Disorder) Counselor1477055374
  13. Manuel LopezBehavior Technician1184351371
  14. Maria LopezStudent in an Organized Health Care Education/Training Program1467991778
  15. Ruben LopezBehavior Technician1689288250
  16. Xiomara LopezCommunity Health Worker1508293986
  17. Karina Lopez HernandezStudent in an Organized Health Care Education/Training Program1083136717
  18. Brighett Lopez SaturninoBehavior Technician1508742453
  19. Elena Lopez-AlvarengaBehavior Technician1760044259
  20. Karla Lopez-LeeMental Health Counselor1275078685
  21. Jacob LordBehavior Technician1609768829
  22. Caroline Loredo, OTR/LOccupational Therapist1730689258
  23. Maria Lorente-Foresti, PH.D.Psychologist1124196688
  24. Celine Lovelace, M. ED.Psychologist1285592071
  25. Jeanne Loveland FreibergerClinical Social Worker1215696232
  26. Christopher Low, O.D.Optometrist1124458195
  27. Ian LoweBehavior Technician1861129678
  28. Stanley Lowe, O.D.Optometrist1629146683
  29. Barbara Lowenstein, AMFTMental Health Counselor1962193094
  30. Celena LozanoBehavior Analyst1538658182
  31. Jonathan LucBehavior Technician1962322339
  32. Rachel LucasPediatric Physical Therapist1720532138
  33. Abby LuceAddiction (Substance Use Disorder) Counselor1063778074
  34. Michael Ludovico, DCChiropractor1295808186
  35. Carol Ludwig, P.T.Orthopedic Physical Therapist1902906696
  36. Alyssa LuisBehavior Analyst1235689837
  37. Juan LunaBehavior Technician1932868163
  38. Felicia LuoBehavior Technician1306737382
  39. Giao Luong, DPMPodiatrist1699767111
  40. John Lusardi, DDSGeneral Practice Dentistry1437245008
  41. Mitzi Queenie LustinaBehavior Technician1407434889
  42. Emily LutonStudent in an Organized Health Care Education/Training Program1679359772
  43. Chad LuuBehavior Technician1548927692
  44. John Luu, DCChiropractor1710403092
  45. Nga LyPsychiatric/Mental Health Nurse Practitioner1093142309
  46. Vivian Ly, PHARM.D.Pharmacist1376824573
  47. Nancy Lynch, M.D.Orthopaedic Hand Surgery Physician1508161472
  48. Sein Lynn, D.D.SGeneral Practice Dentistry1558418129
  49. Scott LyonBehavior Technician1932769015
  50. Hailey MaStudent in an Organized Health Care Education/Training Program1760370613

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.