NPPES file of Aug 9, 2026

Doctors and health care providers in San Antonio, TX

37,749 individual NPPES records list a practice address in San Antonio, 2nd of 694 Texas cities. The largest group is behavior technician: 2,756, 7% of the city's records, against 6% across Texas. Page 110 of 755.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in San Antonio

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

San Antonio in Texas

  • Rank in Texas2nd of 694 cities by records
  • Share of the state8.8% of Texas's records
  • Specialties present25 or more taxonomy codes
  • Top three groups17.2% of all records
  • Behavior Technician rank1st of the 10 Texas cities with the most

Compared with Texas as a whole, San Antonio has 4.8× the state's share of electroneurodiagnostic specialist/technologist records and 0.73× its share of family nurse practitioner records.

Providers in San Antonio, alphabetically

  1. Benigno CastilloAttendant Care Provider1316598352
  2. Camilia CastilloBehavior Technician1902370950
  3. Carlos Castillo, MA LPCMental Health Counselor1003999111
  4. Cassandra CastilloBehavior Technician1548182017
  5. Claudia Castillo, LPCProfessional Counselor1114274933
  6. Cynthia Castillo, M.D.Internal Medicine Physician1457671018
  7. Dailen Castillo, OTDOccupational Therapist1003328352
  8. Danielle CastilloBehavior Technician1063346112
  9. Delia Castillo, RDHDental Hygienist1326891201
  10. Diane Castillo, LCSWClinical Social Worker1912943432
  11. Eduardo Castillo, LIC PSYCH ASSOCIATEMental Health Counselor1316033632
  12. Efrem Castillo, M.D.Family Medicine Physician1003888785
  13. Elizabeth CastilloLicensed Vocational Nurse1730644402
  14. Elyssa Castillo, MS, LPCProfessional Counselor1467941260
  15. Emille Castillo, P.T.Physical Therapist1447210521
  16. Eric CastilloChiropractor1104758127
  17. Giana CastilloOccupational Therapy Assistant1881531119
  18. Glennette Castillo, MDEmergency Medicine Physician1710564596
  19. Hayden Castillo, MSN, APRN, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1952064362
  20. Hilda Castillo, LBSWSocial Worker1881735306
  21. Holly CastilloLicensed Vocational Nurse1972266823
  22. Homero CastilloSurgical Assistant1932445863
  23. Iris CastilloBehavior Technician1710718994
  24. Jason Castillo, CNIMElectroneurodiagnostic Specialist/Technologist1215478011
  25. Javier Castillo, M.D.Maternal & Fetal Medicine Physician1427386804
  26. Jimmie CastilloOccupational Therapist1861867509
  27. Jocasta Castillo, CSWClinical Social Worker1679945869
  28. Jonas CastilloRegistered Respiratory Therapist1003798927
  29. Joselyne Castillo, RNPediatric Registered Nurse1780250076
  30. Joshua CastilloPharmacist1245190198
  31. Juliana Castillo, LPCProfessional Counselor1801551221
  32. Kassandra Castillo, RBTBehavior Technician1295433514
  33. Katia Castillo, ACNPAcute Care Clinical Nurse Specialist1487079968
  34. Kimberly CastilloBehavior Analyst1083252027
  35. Laysha CastilloBehavior Technician1487314563
  36. Leslie CastilloPharmacist1003145889
  37. Lorraine CastilloSpeech-Language Assistant1609357441
  38. Majin Castillo, MDInternal Medicine Physician1104874080
  39. Manuel Castillo, D.D.S.Pediatric Dentistry1639283872
  40. Maria Theresa Castillo, PAMedical Physician Assistant1093792616
  41. Marina Castillo, RNRegistered Nurse1417439266
  42. Mark CastilloGerontology Nurse Practitioner1760368435
  43. Mary CastilloHome Health Registered Nurse1518448323
  44. Michael Castillo, PH.D.Counseling Psychologist1992734479
  45. Ophelia Castillo, APRN, BCAcute Care Nurse Practitioner1528240173
  46. Paul CastilloPhysical Therapist1275964579
  47. Rachel CastilloRegistered Nurse1083566301
  48. Raul Castillo, R.PH.Pharmacist1710006705
  49. Rebecca CastilloHome Health Aide1730842576
  50. Ricardo Castillo, DOFamily Medicine Physician1740287440

The largest Texas cities

  1. Houston61,221
  2. Dallas36,304
  3. Austin26,585
  4. Fort Worth15,511
  5. El Paso11,091

All of Texas →

How to read this directory

San Antonio, Texas appears in the CMS National Plan and Provider Enumeration System with 37,749 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 Antonio - 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 Antonio 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 Antonio is weighted toward Behavior Technician (2,756 clinicians, followed by Student in an Organized Health Care Education/Training Program with 1,911 and Professional Counselor with 1,820). 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 Texas's population, San Antonio reports roughly 123.8 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 Antonio 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 Antonio, TX?

There are 37,749 registered healthcare providers in San Antonio, TX, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in San Antonio?

The most common specialties in San Antonio are Behavior Technician, Student in an Organized Health Care Education/Training Program, Professional Counselor, Licensed Vocational Nurse, Pharmacist. Behavior Technician has the most providers with 2,756.

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.