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 34 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. Rikki SherBehavior Technician1295620748
  2. Shane Sheridan, D.C.Chiropractor1659448199
  3. Steven Sherman, M.D.Family Medicine Physician1063640142
  4. Maxwell ShermoenBehavior Analyst1356147045
  5. Chih-Wen Shi, MDFamily Medicine Physician1982611372
  6. Eric Shields, LVNLicensed Vocational Nurse1255453049
  7. Samantha Shields, LMFTMarriage & Family Therapist1245405091
  8. Ronald Shimmin, M.D.General Practice Physician1225153315
  9. Sinan Shisha, DMDGeneral Practice Dentistry1962843771
  10. Baelee ShriverPhysical Therapist1972461465
  11. Arsenia SibugAttendant Care Provider1710686605
  12. Michelle Sierra RamirezBehavior Analyst1982190179
  13. Erik Siftar, P.T., C.S.C.S.Orthopedic Physical Therapist1306007935
  14. Alyssa Siljendahl, PTPhysical Therapist1154185726
  15. Nathan Simmons, PSY.D.Psychologist1447313846
  16. Paul Simon, MDFamily Medicine Physician1659060424
  17. Brianna SimpsonBehavior Technician1134013279
  18. Noahlynn SimsBehavior Technician1508792862
  19. Amy Sinatra, MTMassage Therapist1982001541
  20. Charizma SinthavongBehavior Technician1174162002
  21. Dawn Sitler, PT, DPT, OCSPhysical Therapist1538476098
  22. Hanagry Siu, N.P.Nurse Practitioner1639502297
  23. Richard Skay, O.D.Optometrist1639251945
  24. Cynthia Skovgard, D.C.Chiropractor1346458460
  25. Susan Slaughter, L.AC.Acupuncturist1457676991
  26. Rebecca Sloan, M.S., CCC-SLPSpeech-Language Pathologist1508225244
  27. Richard Slowey, D.D.S.Dentist1992872055
  28. Christie Smallwood, OTR/LPhysician Assistant1942736699
  29. Brennan SmartBehavior Technician1134010002
  30. Angelina SmithBehavior Technician1700710555
  31. Bat Smith, M.D.Orthopaedic Surgery Physician1295890101
  32. Carlene Smith, PH.D.Clinical Psychologist1295990539
  33. Destiny SmithBehavior Technician1336985449
  34. Gregory SmithGeneral Practice Dentistry1013342872
  35. Kimberle Smith, APCC, PPSCounselor1285593301
  36. Sara SmithBehavior Technician1528936069
  37. Stephanie Smith, DOObstetrics & Gynecology Physician1811276629
  38. Tasha SmithAddiction (Substance Use Disorder) Counselor1902414063
  39. Kendall SobelBehavior Technician1316635808
  40. Traci Socha, DOPediatrics Physician1669478616
  41. Andrew Softley, DDSGeneral Practice Dentistry1669407193
  42. Nuria SolanoCase Manager/Care Coordinator1972705671
  43. Yessica SolanoRehabilitation Practitioner1174374458
  44. Jose Gabriel SolisAthletic Trainer1164229738
  45. Jaren Soloff, RDRegistered Dietitian1508315573
  46. Eva Sorensen, M.D.Neurology Physician1215081427
  47. Abraham SotoBehavior Technician1851250591
  48. Alejandro Soto, M.D.Family Medicine Physician1881936268
  49. Megan Southerly, LVNLicensed Vocational Nurse1265319487
  50. Bryn SovacoolSchool Registered Nurse1326972043

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.