NPPES file of Aug 9, 2026

Doctors and health care providers in San Marcos, CA

1,985 individual NPPES records list a practice address in San Marcos, 113th of 812 California cities. The largest group is behavior technician: 553, 28% of the city's records, against 18% across California. Page 23 of 40.

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 Marcos in California

  • Rank in California113th of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups37.8% of all records

Compared with California as a whole, San Marcos has 4.9× the state's share of school counselor records and 0.49× its share of case manager/care coordinator records.

Providers in San Marcos, alphabetically

  1. Francisco Marquez, M.D.Internal Medicine Physician1316190747
  2. Joan MarquezBehavior Technician1366226417
  3. Laurel MarrBehavior Technician1952296493
  4. Hertzel MarreroBehavior Technician1730881038
  5. Nicole MartRegistered Nurse1154910255
  6. Benny Martin, DOFamily Medicine Physician1619975232
  7. Annette MartinezBehavior Technician1093674731
  8. Edward Martinez, PHARM D.Pharmacist1114195286
  9. Iliana Martinez, NPFamily Nurse Practitioner1336711753
  10. Jessica MartinezAddiction (Substance Use Disorder) Counselor1518355221
  11. Keila MartinezBehavior Technician1366362097
  12. Kelly Martinez, MDObstetrics & Gynecology Physician1063616639
  13. Stephanie MartinezBehavior Technician1306770169
  14. Susan Martinez AlejandreSchool Counselor1861351199
  15. Yalee Martinez ArenalBehavior Technician1699520577
  16. Eliana Marvizon, AU.D.Audiologist1215869888
  17. Neika Maryn, OTR/LOccupational Therapist1649833054
  18. Cheri Mason, LCSWClinical Social Worker1558566141
  19. Sharon Massoth, LCSWClinical Social Worker1093830861
  20. William Mathias, PA-CPhysician Assistant1285806323
  21. Julie Matias, D.O.Family Medicine Physician1083094510
  22. James Matracia, M.A. MFTMarriage & Family Therapist1417155094
  23. Lisa Mattey, RADT 1Addiction (Substance Use Disorder) Counselor1891225355
  24. Dale Mauser, DCChiropractor1366505497
  25. Jill Ellen Mauser, DCChiropractor1033274311
  26. Marissa MaxeyAddiction (Substance Use Disorder) Counselor1275242729
  27. Rickey Maxwell, LMFTMarriage & Family Therapist1245368232
  28. Michelle May, MS, CCC-SLPSpeech-Language Pathologist1679932339
  29. Lauren MayaBehavior Technician1720871866
  30. Dave MbahBehavior Technician1306650130
  31. Ken McAndrews, PHARM.D.Pharmacotherapy Pharmacist1801823364
  32. Abbi McCallumBehavior Technician1366187833
  33. Shaun McCardellBehavior Technician1306346275
  34. Raquel McCarthy, NPNurse Practitioner1659971729
  35. Catherine McCarthy-Payne, CCC-SLPSpeech-Language Pathologist1073160180
  36. Edward McClay, M.D.Medical Oncology Physician1497727465
  37. Marisa McConnaugheyBehavior Technician1265279772
  38. Charles McCoy, DCChiropractor1053652461
  39. Cortney McCoy-LeblancAddiction (Substance Use Disorder) Counselor1942773924
  40. Andrea McCuskey, PT, MS, OCSPhysical Therapist1407008865
  41. Devin McDonaldBehavior Technician1740032424
  42. Sarah McDonald, LCSWClinical Social Worker1831569599
  43. Elizabeth McElmell, P.A.Physician Assistant1659574390
  44. Nicole McEntire, RBTBehavior Technician1891296075
  45. Susan McGarry, PHARM DPharmacist1215104187
  46. Alexa McGeeBehavior Technician1578458022
  47. Brigid McGuireSchool Psychologist1568320711
  48. Allyson McGunagle, RDRegistered Dietitian1821764598
  49. Kathryn McHenry, D.O.Family Medicine Physician1326458373
  50. Mabelle McKahan, LCSWClinical Social Worker1255993127

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 Marcos, California appears in the CMS National Plan and Provider Enumeration System with 1,985 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 Marcos - 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 Marcos 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 Marcos is weighted toward Behavior Technician (553 clinicians, followed by Marriage & Family Therapist with 101 and Pharmacist with 96). 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 Marcos reports roughly 5.1 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.

Of California's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a San Marcos practice address, a coverage gap San Marcos patients typically fill by traveling to a larger nearby hub.

For San Marcos 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 Marcos, CA?

There are 1,985 registered healthcare providers in San Marcos, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in San Marcos?

The most common specialties in San Marcos are Behavior Technician, Marriage & Family Therapist, Pharmacist, Physical Therapist, Addiction (Substance Use Disorder) Counselor. Behavior Technician has the most providers with 553.

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.