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 64 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. Courtney SelgBehavior Technician1043990294
  2. Sylvan SeligAddiction (Substance Use Disorder) Counselor1114324944
  3. Michael SeligsonCounselor1083925804
  4. Stephanie SeltzerBehavior Analyst1457866493
  5. William Seltzer, PH.D., F.A.C.M.G.Ph.D. Medical Genetics1649485616
  6. Lindsay Sencenbaugh, RNRegistered Nurse1619156007
  7. Julia Senders, NURSE PRACTITIONERNurse Practitioner1093487589
  8. Katrina Sesline, LCSW, MPHClinical Social Worker1114398278
  9. Glenn SetionoBehavior Analyst1700337151
  10. Lori Severais, P.T.Physical Therapist1841310307
  11. Mayrendy Severino MedinaMental Health Counselor1518413079
  12. Holly Severson, R.N.Registered Nurse1679702237
  13. McKenna ShadeBehavior Technician1114749041
  14. Katherine Shadish, PHDClinical Psychologist1336589043
  15. Marisa ShaffBehavior Technician1013517697
  16. Hema Shah, MDInternal Medicine Physician1740235704
  17. Robyn ShalinskyPharmacist1154030096
  18. Zaynab ShamsanBehavior Analyst1720536931
  19. Mona ShamshikhPharmacist1740509926
  20. Angelica ShaoBehavior Technician1003766643
  21. Emily ShaoSpeech-Language Pathologist1699504886
  22. Zhiqiang ShaoAcupuncturist1831553767
  23. Sena SharmaBehavior Technician1578113742
  24. Varinda SharmaBehavior Technician1558951095
  25. Matthew Shaw, PA-CPhysician Assistant1730453390
  26. Gregory SheehanBehavior Analyst1003287889
  27. Joseph SheehyGeneral Practice Dentistry1821214727
  28. Mary Shehee, AMFTMarriage & Family Therapist1134248800
  29. Nicole Shek, R.N., P.H.N.Case Manager/Care Coordinator1447431234
  30. Joanna Shell, L.AC., M.S.T.C.M.Acupuncturist1093872160
  31. Calvin SheltonCounselor1811037476
  32. Michael ShelverClinical Exercise Physiologist1467098772
  33. Shantal SheppardCounseling Psychologist1750277554
  34. Matthew Sheu, L. ACAcupuncturist1740352939
  35. Baley ShieldsBehavior Technician1386360568
  36. Aileen Shieu, MDSurgery of the Hand (Surgery) Physician1154515385
  37. Lori Shiffer, CTRSBehavior Technician1982262366
  38. Takashi Shigihara, D.D.S.Dentist1134384381
  39. Yumeto Shigihara, DDSGeneral Practice Dentistry1316602410
  40. Junichi ShimaokaClinical Psychologist1003267329
  41. Haeri ShinSchool Psychologist1033033477
  42. Anne ShingAcupuncturist1801132154
  43. Samiko Shiroma, LMFTMarriage & Family Therapist1437760865
  44. Paul ShiuRheumatology Physician1508495433
  45. Ramin Shiva, D.C.Chiropractor1619043106
  46. Ornit Shoham, MFTMarriage & Family Therapist1922417435
  47. George Shorago, M.D.Otolaryngology Physician1033180211
  48. Michaela ShouldisReproductive Endocrinology Physician1659233120
  49. Llinda Showaihat, D.D.S.General Practice Dentistry1790808749
  50. Mark Showen, M.D.Pediatrics Physician1477576817

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.