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 45 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. Carla MansfieldRegistered Nurse1124279070
  2. Cassandra Manuel, MSN, APRN, FNP-CFamily Nurse Practitioner1689140642
  3. Romina ManuelBehavior Analyst1699130096
  4. Julie Manyak, MS, CCCSpeech-Language Pathologist1124224605
  5. Tatyana Manyak, DDSGeneral Practice Dentistry1477572501
  6. Brady ManzBehavior Technician1417768466
  7. Rodolfo Manzanares, PTAPhysical Therapy Assistant1558629030
  8. Julia ManzanoBehavior Technician1801743877
  9. Minyang Mao, M.D.Psychiatry Physician1487810818
  10. Jaspreet MaraharBehavior Analyst1194129213
  11. Aleah MarcelinoBehavior Technician1043775174
  12. Kylie MarchioBehavior Technician1154964328
  13. Shaun Marchisheck, CPTPhlebotomy Technician1588149066
  14. Rebecca Marculescu, AU.D.Audiologist1043331713
  15. Sonia MaresCase Manager/Care Coordinator1245627512
  16. Aileen MarezBehavior Technician1487512257
  17. Lilach MargulisCommunity Health Worker1134904451
  18. Blake MariaBehavior Technician1225869027
  19. John Marin, MFTMarriage & Family Therapist1326103300
  20. Gloria MariscalCase Manager/Care Coordinator1134246424
  21. Lois Mark, LCSWMarriage & Family Therapist1215077730
  22. Terri Mark, O.D.Optometrist1871649202
  23. Connie MarkoffCounselor1134686991
  24. Anna Markus, RDRegistered Dietitian1114489952
  25. Helen Marlo, PH.D.Clinical Psychologist1487411765
  26. Tatyana MarmuyenkoBehavior Technician1023698420
  27. Nallely Marquez ZapataBehavior Technician1003374810
  28. Samantha MarraBehavior Technician1952143174
  29. Doris MarroquinMental Health Counselor1124145339
  30. Celina Marroquin AmbrizBehavior Technician1982572376
  31. Erica MarshallMental Health Counselor1689267759
  32. Amanda Martin, LMFT, ATRMarriage & Family Therapist1104430933
  33. Gene Martin, D.C.Chiropractor1336267889
  34. Jesse MartinNutritionist1154285450
  35. June Martin, PH.D., LMFTClinical Psychologist1184836330
  36. Kimberly Martin, AMFTMarriage & Family Therapist1710406764
  37. Susanne Martin, MDInternal Medicine Physician1568610525
  38. Andrew MartinezBehavior Analyst1427502319
  39. Carla MartinezBehavior Analyst1932041092
  40. Carolina MartinezDay Training/Habilitation Specialist1558923359
  41. Christephany MartinezBehavior Technician1861194631
  42. Claudia Martinez, PMHNPStudent in an Organized Health Care Education/Training Program1497475792
  43. Cuauhtemoc Martinez, B.A.Mental Health Counselor1083930291
  44. Gwendolyn MartinezBehavior Technician1720821366
  45. Jennifer MartinezBehavior Technician1750245791
  46. Maria MartinezMental Health Counselor1841622339
  47. Maria Del Rosario MartinezMental Health Counselor1104321165
  48. Monique MartinezBehavior Technician1477377042
  49. Saila Martinez, MSWSocial Worker1174647382
  50. Sandra MartinezRegistered Nurse1487494357

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.