NPPES file of Aug 9, 2026

Doctors and health care providers in Lancaster, CA

4,273 individual NPPES records list a practice address in Lancaster, 49th of 812 California cities. The largest group is behavior technician: 436, 10% of the city's records, against 18% across California. Page 65 of 86.

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).

Lancaster in California

  • Rank in California49th of 812 cities by records
  • Share of the state0.4% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups24.6% of all records

Compared with California as a whole, Lancaster has 4.5× the state's share of peer specialist records and 0.56× its share of physical therapist records.

Providers in Lancaster, alphabetically

  1. Nicole RendonBehavior Technician1225880453
  2. Aileen Repuyan, PTPhysical Therapist1568636777
  3. Carley RetaDay Training/Habilitation Specialist1528440062
  4. Victoria Reti, MFTMarriage & Family Therapist1407987464
  5. Colin ReubenCommunity Health Worker1366917445
  6. Rachel RevaiAddiction (Substance Use Disorder) Counselor1689127664
  7. Michelle RevelesLicensed Vocational Nurse1285264226
  8. Agnes ReyesRehabilitation Practitioner1730252560
  9. Angie ReyesStudent in an Organized Health Care Education/Training Program1275352155
  10. Cecilia ReyesBehavior Technician1932783339
  11. Cynthia Reyes, BSDay Training/Habilitation Specialist1326932062
  12. Ditas Joy Reyes, FNPFamily Nurse Practitioner1811658040
  13. Fernando ReyesBehavior Technician1932668001
  14. Kevin ReyesCommunity Health Worker1467086173
  15. Lexie ReyesBehavior Technician1285209221
  16. Marie Michelle ReyesMarriage & Family Therapist1477839850
  17. Nicol Reyes, NONEBehavior Technician1336873652
  18. Yvette ReyesSocial Worker1952233231
  19. Ruby Reyes MercadoPeer Specialist1154016582
  20. Nestor Reyes-RamirezAddiction (Substance Use Disorder) Counselor1740029008
  21. Isabelle ReynaBehavior Technician1184561730
  22. Diane Reynaga, CAADECounselor1144459850
  23. Heatherlyn Reynolds, CVAAddiction (Substance Use Disorder) Counselor1144730334
  24. Lakeyia RhodesBehavior Technician1881384378
  25. Jessica Ribera, PA-CPhysician Assistant1619281631
  26. Deborah Rice, NPNurse Practitioner1700915832
  27. Gerald Rice, MFTMarriage & Family Therapist1386761922
  28. Trisha Rich-Thurm, MA, MFT, PSYDMarriage & Family Therapist1508997909
  29. Angel RichardClinical Social Worker1003561077
  30. Matthew Richard, M.D.Emergency Medicine Physician1043293004
  31. Dainesha RichardsCase Manager/Care Coordinator1164216339
  32. David RichardsClinical Social Worker1689833113
  33. David RichardsCase Manager/Care Coordinator1306652078
  34. Rashaad RichardsCase Manager/Care Coordinator1063259380
  35. Cathy RichardsonAttendant Care Provider1407785637
  36. Janae RichardsonCase Manager/Care Coordinator1790522027
  37. Robert Richardson, M.D.Emergency Medicine Physician1982642179
  38. September RichardsonStudent in an Organized Health Care Education/Training Program1730064650
  39. Virginia Richardson, LVNLicensed Vocational Nurse1548811383
  40. Virginia RichieAddiction (Substance Use Disorder) Counselor1417549494
  41. Kimberly RichmondBehavior Technician1386478485
  42. Joyce Ricks, AMFTMental Health Counselor1164679403
  43. La Shell RicksMarriage & Family Therapist1053074948
  44. Bianca RicoCommunity Health Worker1588298202
  45. Linda RicoClinical Social Worker1871458265
  46. Yaqueline Rico-GonzalezAudiologist1083472567
  47. Ronni Riihimaki, MACase Manager/Care Coordinator1437274784
  48. Alida Riley, LMFTMarriage & Family Therapist1245487586
  49. Judy Riley, LMFTMarriage & Family Therapist1558919647
  50. Kristina RileyClinical Social Worker1417543851

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

Lancaster, California appears in the CMS National Plan and Provider Enumeration System with 4,273 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 Lancaster - 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 Lancaster 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 Lancaster is weighted toward Behavior Technician (436 clinicians, followed by Marriage & Family Therapist with 331 and Addiction (Substance Use Disorder) Counselor with 283). 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, Lancaster reports roughly 11 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 Lancaster 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 Lancaster, CA?

There are 4,273 registered healthcare providers in Lancaster, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Lancaster?

The most common specialties in Lancaster are Behavior Technician, Marriage & Family Therapist, Addiction (Substance Use Disorder) Counselor, Case Manager/Care Coordinator, Clinical Social Worker. Behavior Technician has the most providers with 436.

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.