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 67 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. Marcia Spencer, NPFamily Nurse Practitioner1891281051
  2. Robert Spencer, M.D.Emergency Medicine Physician1477758993
  3. Susan Spencer, MDObstetrics & Gynecology Physician1477664795
  4. Margaret Spicer, DCChiropractor1922468610
  5. Anne Spiegel, DDSGeneral Practice Dentistry1821162751
  6. Julie SpillaneMental Health Counselor1265914675
  7. Charles Spitz, DDSDentist1386792919
  8. Alla Sragets, M.D.Obstetrics & Gynecology Physician1013956978
  9. Christine St. CharlesBehavior Technician1639673049
  10. Jessica Stafford-Eady, LVNLicensed Vocational Nurse1265231559
  11. Marguerite StaggMental Health Counselor1811332455
  12. Susan Stahl, MFTMarriage & Family Therapist1861650830
  13. Matthew Staker, AMFTMarriage & Family Therapist1770095234
  14. Kelsey StalcupBehavior Technician1326621897
  15. Jerilyn StalfordPhysical Therapist1134273642
  16. Demetra Stamm, M.D.General Practice Physician1396906269
  17. Brett Stark, B.S. PHARMACYPharmacist1871861039
  18. Suzanne StarrCounselor1275673832
  19. Gina Stathacopoulos, PT MA PT GDMTPhysical Therapist1801940317
  20. Melanie Stauffer, LMFTMarriage & Family Therapist1235650979
  21. Taylor SteedBehavior Technician1710793401
  22. Dalton SteeleDay Training/Habilitation Specialist1396623641
  23. Myra Steele, LPCProfessional Counselor1821567843
  24. Suzi StefanacNursing Home Administrator1710611975
  25. Ivana Steigman, PH.D.Student in an Organized Health Care Education/Training Program1912184672
  26. Scarlett SteinBehavior Technician1669177663
  27. Sharon Stein, MDDiagnostic Radiology Physician1952348260
  28. Kathryn Steinbaugh, MFCCMarriage & Family Therapist1497880959
  29. William Steiner, O.D.Optometrist1912996034
  30. Dennis Stempler, M.DEmergency Medicine Physician1518907583
  31. Emily StensonBehavior Technician1003435264
  32. Kristin Stent, PHDPsychologist1932382629
  33. Shant Stephanian, DOStudent in an Organized Health Care Education/Training Program1992492375
  34. Lori Sterling, RN, PHNRegistered Nurse1205417268
  35. Michael Stevens, M.D.Rheumatology Physician1932198793
  36. Virginia Stewart, LCSWClinical Social Worker1215047873
  37. Carmen Stickel, RN, PHNRegistered Nurse1114159316
  38. Rachelle StiggallStudent in an Organized Health Care Education/Training Program1548525421
  39. Denise StilwellMental Health Counselor1982969234
  40. Jennifer Stimson, REGISTERED DIETITIANRegistered Dietitian1356710164
  41. Karena StipeBehavior Technician1902685548
  42. Alejandra StokMarriage & Family Therapist1679691133
  43. Nikki Stokman-FuentesMental Health Counselor1013436096
  44. Alisha StoneBehavior Technician1366269409
  45. Adelia StoutMental Health Counselor1518474634
  46. Laura Stovall, LCSWClinical Social Worker1093901373
  47. Katharine StuderCommunity Health Worker1639948367
  48. Sharon Su, DMD, MSDOrthodontics and Dentofacial Orthopedics Dentistry1679443071
  49. Athena SuarezCommunity Health Worker1851579007
  50. Felicia Sue, P.TPhysical Therapist1114265162

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.