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 42 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. Beth Lilly-ToshikianBehavior Analyst1891204178
  2. Gabriel Hui Hwang Lim, RDRegistered Dietitian1538020599
  3. Grace LimOccupational Therapist1720299613
  4. Nicholas Lim, RDRegistered Dietitian1841984952
  5. David Lin, PHDPsychologist1588735807
  6. Ian Lin, MDInternal Medicine Physician1245306836
  7. Jennifer Lin, MDInternal Medicine Physician1336342708
  8. Jennifer Lin, O.D.Optometrist1144534827
  9. Jessica Lin, MT-BCMusic Therapist1861353179
  10. Sue Lin, L.AC.Acupuncturist1013083864
  11. Wendy Lin, ODOptometrist1922127125
  12. Deidre LinburnClinical Social Worker1992821243
  13. Jennifer LindseyBehavior Analyst1740771849
  14. Dennica LingBehavior Technician1558842450
  15. Maria LinoBehavior Technician1588216758
  16. Jeanne Linquist, M.D.Infectious Disease Physician1720143803
  17. Richard LipfinAddiction (Substance Use Disorder) Counselor1447819750
  18. Akiko LiptonClinical Social Worker1114370939
  19. Edward Lipton, M.D.Emergency Medicine Physician1770789604
  20. Jason Lipton, DDSGeneral Practice Dentistry1669561114
  21. Lerida Lipumano-Picazo, DMDPediatric Dentistry1780899260
  22. Marie Lirio, RN, MS, CNSRegistered Nurse1104058304
  23. Megan Lisska, MDPsychiatry Physician1164582359
  24. Fletcher LittleBehavior Technician1356214563
  25. William LittleAddiction (Substance Use Disorder) Counselor1619303146
  26. Anthony Liu, M.D.Ophthalmology Physician1912232224
  27. Arlene LiuSpeech-Language Pathologist1588090922
  28. Jaryee LiuPsychiatry Physician1194576850
  29. May Liu, DDSGeneral Practice Dentistry1164726618
  30. Yi Yi Liu, MDFamily Medicine Physician1255416236
  31. Zihao LiuBehavior Technician1700359320
  32. Edith Livelo, ABOC, RDOOptician1316010960
  33. Joseph LiveloPhysical Therapist1700690583
  34. Graham LivesayProfessional Counselor1124681986
  35. Robert Livingstone, LCSWClinical Social Worker1003052168
  36. Anna Liviz, D.D.S.General Practice Dentistry1144247107
  37. Jazmin Llamas, PHDClinical Psychologist1972081933
  38. Daphne Lo, MDGeriatric Medicine (Internal Medicine) Physician1730470121
  39. Marvin Lo, MDOrthopaedic Surgery Physician1982864393
  40. Sophia Lo, LO SOPHIASpeech-Language Pathologist1780958793
  41. Suetying LoPharmacist1437550704
  42. Hazel LoaBehavior Technician1154185809
  43. William Lock, MDObstetrics & Gynecology Physician1770656753
  44. Connie Lock-Bouvier, LACAcupuncturist1891128831
  45. Cameron LockwoodStudent in an Organized Health Care Education/Training Program1942191234
  46. Krati LodhaBehavior Technician1417582362
  47. Ashly Loera MartinezBehavior Technician1861343261
  48. Lily LoganBehavior Technician1861362972
  49. Angelina Logarta, NPNurse Practitioner1659930972
  50. Katherine Lok Chan, ODOptometrist1336302637

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.