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 4 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. Crystal AragonAttendant Care Provider1710570510
  2. Frida Araiza Robledo, DDSDentist1801621974
  3. Pedram Aram, M.DUrology Physician1730510579
  4. Jennifer AranaAssistant Behavior Analyst1689409781
  5. Emely Arana-Gonzalez, BSCCase Manager/Care Coordinator1255905501
  6. Christina ArandaCase Manager/Care Coordinator1649696485
  7. Melissa ArceRehabilitation Practitioner1356699359
  8. Brenda ArceoCase Manager/Care Coordinator1619266095
  9. Leslie ArceoBehavior Technician1013644863
  10. Darline Arceo GutierrezCase Manager/Care Coordinator1093265423
  11. Raimonda Arcuri, D.C.Chiropractor1740350107
  12. Nicole ArduiniMental Health Counselor1013036029
  13. Adriana ArellanoBehavior Technician1821890971
  14. Gerardo ArellanoBehavior Analyst1205652674
  15. Mareesa ArellanoLicensed Vocational Nurse1659097632
  16. Monica ArellanoBehavior Analyst1497272231
  17. Roxana ArellanoBehavior Technician1174352322
  18. Alejandro Arenas, M.D.Anesthesiology Physician1760802144
  19. Jose Arenas MesiasBehavior Technician1477406379
  20. Luis Arevalo ArriagaRehabilitation Practitioner1275945941
  21. Elizabeth AriasCase Manager/Care Coordinator1346694742
  22. Hilda AriasLicensed Vocational Nurse1972437416
  23. Jennifer AriasMental Health Counselor1194074047
  24. Pamela AriasCase Manager/Care Coordinator1073072336
  25. Adryanna Arias-MarquezBehavior Technician1740947480
  26. Roi Brenn ArlanteRegistered Nurse1194414060
  27. Judy Ann Armas, R.PHPharmacist1043578552
  28. Sergio ArmendarizCommunity Health Worker1073837621
  29. Teri Armstead, R.NMedical-Surgical Registered Nurse1801233788
  30. Kimberly ArmstrongDay Training/Habilitation Specialist1003355439
  31. David Arnett, MSWClinical Social Worker1518493816
  32. Hilary ArnoldAssistant Behavior Analyst1427999176
  33. Merrisa Arnold SternDoula1831895598
  34. Dorelle ArnwineRehabilitation Practitioner1780886119
  35. Marilyn AronoffAddiction (Substance Use Disorder) Counselor1548511363
  36. Paige Aronson, P.T.A.Physical Therapy Assistant1386379725
  37. Linda Arous, MDFamily Medicine Physician1700043320
  38. Gina ArreagaRehabilitation Practitioner1407315930
  39. Josefina Arreola, MSW, ASWClinical Social Worker1427280841
  40. Yady ArreolaCase Manager/Care Coordinator1083959779
  41. Percy ArrezaPsychiatric/Mental Health Registered Nurse1851090476
  42. Angel ArriagaDay Training/Habilitation Specialist1083361166
  43. Melissa ArriagaBehavior Technician1851850697
  44. Elizabeth ArroyoBehavior Technician1699475384
  45. Emily ArroyoBehavior Technician1750099362
  46. Manuel Arroyo, M.D.Family Medicine Physician1508860412
  47. Maria ArroyoMarriage & Family Therapist1720461247
  48. Virginia ArroyoDay Training/Habilitation Specialist1669184891
  49. Yvette Arroyo, M.A., LPCCProfessional Counselor1245508332
  50. Monique ArteagaStudent in an Organized Health Care Education/Training Program1437650660

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.