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 59 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. Lisa RegisterBehavior Analyst1922470228
  2. Amanda Matilda Regodon Wallin, MD, MPHPsychiatry Physician1982231205
  3. Taea Regua, BT/RBTBehavior Technician1811668775
  4. Laurel Reid, D. C.Chiropractor1093896557
  5. Kendall ReinerStudent in an Organized Health Care Education/Training Program1053724393
  6. Clifford ReisMarriage & Family Therapist1003936691
  7. Karen Relucio, MDInfectious Disease Physician1952471484
  8. Kelly Ren, DDSGeneral Practice Dentistry1518593649
  9. Cybele RenaultInfectious Disease Physician1427100965
  10. Katia Renderos, PHN, MSNRegistered Nurse1689850471
  11. Celeste RendonMental Health Counselor1801232525
  12. Daniel Rengstorff, M.D.Gastroenterology Physician1033295662
  13. Emily RenteriaBehavior Technician1881423598
  14. Melanie RequenaBehavior Analyst1578092433
  15. Miguel RestrepoBehavior Analyst1417419912
  16. Cydney ReyesMental Health Counselor1891903878
  17. Eleanor ReyesMental Health Counselor1932442688
  18. Margarita ReyesPeer Specialist1578313714
  19. Rachelle Reyles, PHARMDPharmacist1912151697
  20. Brandi ReynaStudent in an Organized Health Care Education/Training Program1659770451
  21. Diyanna RhodmanBehavior Technician1538901988
  22. Tabish Riaz, MDPsychiatry Physician1366062689
  23. Alexa RicchiutoBehavior Analyst1205487022
  24. Anthony RicciClinical Exercise Physiologist1467072801
  25. Melissa Riccio, LCSWClinical Social Worker1912193434
  26. Kimberly Rich, MFTMarriage & Family Therapist1982954061
  27. Philip Richardi, DPTPhysical Therapist1720624414
  28. Annie Richardson, RNRegistered Nurse1407035819
  29. Cortney Richardson, LCSWClinical Social Worker1710472634
  30. Candice Richardson-Solomon, LIC. MFTMarriage & Family Therapist1730221326
  31. Melinda Ricossa, RNRegistered Nurse1114235280
  32. Kaitlin RidadBehavior Technician1780259077
  33. Robert Rideau, DDSGeneral Practice Dentistry1619027273
  34. Joann Riggio, MFTMarriage & Family Therapist1134451107
  35. Michael RihmCase Manager/Care Coordinator1417186727
  36. Kimberly RileyAddiction (Substance Use Disorder) Counselor1588489439
  37. Susan Riley, M.S. M.F.C.C.Marriage & Family Therapist1265814875
  38. Madison RiojasBehavior Technician1851236194
  39. Emma RiosBehavior Technician1306797394
  40. Martika RiosBehavior Technician1760354831
  41. Melissa Risso, LMFTMarriage & Family Therapist1851846349
  42. Dale Ritzo, M.D.Internal Medicine Physician1255499323
  43. Anna RiveraBehavior Technician1861351082
  44. Georgina RiveraMarriage & Family Therapist1508386293
  45. Krissandra Rivera, RNRegistered Nurse1417136813
  46. Renee RiveraChild & Adolescent Psychiatric/Mental Health Registered Nurse1750279089
  47. Sandra RiveraStudent in an Organized Health Care Education/Training Program1225366073
  48. Veronica RiveraBehavior Analyst1740645134
  49. Louise RobainaClinical Social Worker1487770178
  50. Karisman Roberts-DouglassMental Health Counselor1437307394

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.