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 9 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. Eric David, LMFTMarriage & Family Therapist1053822577
  2. Heather David, M.P.T.Physical Therapist1639391014
  3. Mirakel DavidsonBehavior Technician1043069172
  4. Nikia DaviesAddiction (Substance Use Disorder) Counselor1477146199
  5. Dana DavisDriver1043820269
  6. Jaden DavisBehavior Technician1760107593
  7. Teri Davis, ED.D., LCSWClinical Social Worker1669825956
  8. Melanie Dawson, LMFTMarriage & Family Therapist1538538582
  9. Avital DayanMarriage & Family Therapist1265615199
  10. Mia De JesusBehavior Technician1255250635
  11. Alan De La CruzBehavior Technician1891483806
  12. Miranda De La HerranBehavior Technician1932824760
  13. Veronica De La Torre, PPSSchool Counselor1285587170
  14. Guillermina De NunezPersonal Care Attendant1902692759
  15. Christsenio Dean, RN, IBCLCLactation Consultant (Registered Nurse)1598522740
  16. Lauren Debski, NPPsychiatric/Mental Health Nurse Practitioner1144874694
  17. Marco DecasasBehavior Technician1033940861
  18. Kristine DeckerSchool Counselor1932034626
  19. Angela DeitchDoula1447057062
  20. Hayley Del RioBehavior Technician1740936947
  21. Emmanuel Delagrammaticas, DDSGeneral Practice Dentistry1578660452
  22. Idelle P. DelapenaBehavior Technician1073269262
  23. Kathleen DelmastroLicensed Vocational Nurse1659857985
  24. Ann Delucas, PHDClinical Psychologist1952373482
  25. Jennifer DemeoBehavior Technician1174377279
  26. Haley DemuthBehavior Technician1447990759
  27. Hannah DennisBehavior Technician1326997073
  28. Ariel DennyBehavior Analyst1851836167
  29. Dorian DeptuchBehavior Technician1174312094
  30. Anthony DesalesBehavior Technician1679333272
  31. Garrett Desrosiers, PT, DPTPhysical Therapist1679921084
  32. Kayleigh Desrosiers, PT, DPTPhysical Therapist1689039349
  33. Alexandra DexterBehavior Technician1922832658
  34. Laura Deyo, DDSOrthodontics and Dentofacial Orthopedics Dentistry1659637973
  35. Rachel Dezember, LCSWClinical Social Worker1649370826
  36. Riti Di AngeliSchool Psychologist1992463368
  37. Shannon Di PietroBehavior Analyst1972004190
  38. Abigail DiazBehavior Technician1497681779
  39. Caitlyn DiazBehavior Technician1619656329
  40. Carolina DiazSpeech-Language Assistant1881527901
  41. Marisa DiazMental Health Counselor1205386372
  42. Yvette DiazBehavior Technician1043059108
  43. Arely Diaz BarronBehavior Technician1699669739
  44. Steven DickersonFoot & Ankle Surgery Podiatrist1851950257
  45. Cynthia Dickinson, CNMAdvanced Practice Midwife1558421362
  46. Huong Diep, PSY.D., ABPPClinical Psychologist1871735266
  47. Eloisa DietrichPsychiatric/Mental Health Nurse Practitioner1134512288
  48. Megan Dietz, D.D.S.Dentist1821327198
  49. Jennie Digrado, OTR, OTR/LOccupational Therapist1801257118
  50. Sze Hoay Ding, M.D.Internal Medicine Physician1023239035

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.