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 65 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. Mabel Shrestha, PHARMD.Pharmacist1932493723
  2. Pabitra ShresthaBehavior Technician1538029491
  3. Jagruti Shukla, MDInternal Medicine Physician1639245533
  4. Kirill ShumilovClinical Exercise Physiologist1831847078
  5. Amanda SiamaknejadStudent in an Organized Health Care Education/Training Program1710624093
  6. Brandon SiaoBehavior Analyst1609343706
  7. Marites SicatPhysical Therapist1538794797
  8. Cathleen Sickles, DPTPhysical Therapist1841869237
  9. Aaseem SidhuStudent in an Organized Health Care Education/Training Program1851282842
  10. Margaret SidunAddiction (Substance Use Disorder) Counselor1962209270
  11. John Siebel, M.D.Medical Oncology Physician1780741306
  12. Shirley Siebert, L.AC.Acupuncturist1396076840
  13. Michael Siegel, M.D.Neurology Physician1699794115
  14. David Sifri, PSY.D.Clinical Psychologist1851008478
  15. Edgar Ryan SilvaBehavior Technician1295448843
  16. Mary Claire Silva, RNMental Health Counselor1841623568
  17. Melissa SilvaBehavior Technician1235708926
  18. Alyssa SilvasBehavior Technician1376103424
  19. Roxanne Silver, AMFTMarriage & Family Therapist1942813423
  20. Gloria Silvestri, PHN, RNRegistered Nurse1386972529
  21. Jody Simon, DOULADoula1437425394
  22. Linda SimonsenSocial Worker1497979066
  23. Amore SimpsonBehavior Technician1538014436
  24. Sarah Simpson LinaresMental Health Counselor1760183453
  25. Clarissa Sin, O.D.Optometrist1619106903
  26. Jessica Sin, LMFT132686Marriage & Family Therapist1972992212
  27. Meghna SinghAddiction (Substance Use Disorder) Counselor1285418822
  28. Neha SinghBehavior Analyst1053802611
  29. Rakhi Singh, MDFamily Medicine Physician1083763981
  30. Shelvina SinghBehavior Analyst1952899486
  31. Shirley SinghBehavior Technician1861157083
  32. Shruti Singh, DDSDentist1811507320
  33. Ashita SinhaDentist1225506884
  34. Elena Sinha, FNPFamily Nurse Practitioner1750161022
  35. Amanda SinnottBehavior Technician1568946267
  36. Antonio SiopackBehavior Technician1245154723
  37. Sandra Rose SipinBehavior Technician1932861069
  38. Tivoli SiscoMarriage & Family Therapist1982193728
  39. Tyler SisonBehavior Analyst1629441340
  40. Daniel SituPeer Specialist1306651195
  41. Carolyn SiuPhysician Assistant1679304448
  42. Marna Skaar, M.D.Specialist1184711988
  43. Jessica SklarStudent in an Organized Health Care Education/Training Program1568138915
  44. Yuliya Skuba, LMFTMarriage & Family Therapist1437586617
  45. Barbara Sky, MFTMarriage & Family Therapist1346778875
  46. Jasmine SlavinStudent in an Organized Health Care Education/Training Program1861173411
  47. Lisa Slede, LMFTMarriage & Family Therapist1972787125
  48. Andrea Sleeth, WHNP-BCWomen's Health Nurse Practitioner1356956304
  49. Emily SmallBehavior Technician1902673924
  50. Jack SmerdelBehavior Technician1821767492

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.