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 21 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. Manish Desai, D.OInternal Medicine Physician1699951830
  2. Yhair DesantiagoOptometrist1417735986
  3. Alex Detrana, PAMedical Physician Assistant1568549970
  4. Frank Detrana, MDEmergency Medicine Physician1043275407
  5. Travis Deuson, MDEmergency Medicine Physician1598720963
  6. Andrew Deutsch, M.D.Diagnostic Radiology Physician1356305437
  7. Patricia Deux-Sasaki, RNRegistered Nurse1538699863
  8. Stephanie Devaney, MDAnesthesiology Physician1881713022
  9. Carol Devargas, CADC II, CAMS IIHealth Educator1588147292
  10. Deborah Devine, LCSWClinical Social Worker1104943695
  11. Thomas Dewald, D.C.Sports Physician Chiropractor1194703827
  12. Mike Dhaliwal, M.D.Anesthesiology Physician1790913812
  13. Sara Dhamija, M.D.Geriatric Medicine (Internal Medicine) Physician1275643405
  14. Thana Dhanaphibul, PHARMD.Pharmacist1518492214
  15. Prathana Dhar, ODOptometrist1972099588
  16. Prithviraj Dharmaraja, M.D.Gastroenterology Physician1932111424
  17. Daljit DhillonPharmacist1386926285
  18. Manprit Dhillon, MDNeurological Surgery Physician1710963038
  19. Sukhvir Dhinsa, FNP-BCFamily Nurse Practitioner1255707493
  20. Michael Diament, MDDiagnostic Radiology Physician1053394536
  21. Araceli DiazBehavior Technician1437892783
  22. Arlene DiazCase Manager/Care Coordinator1467571356
  23. Aviela DiazRehabilitation Practitioner1487034088
  24. Berena DiazOther Technician1487154985
  25. Britney Diaz, BACHELOR'SBehavior Technician1033924097
  26. Dennise DiazCase Manager/Care Coordinator1184195620
  27. Elizabeth Diaz, LCSWClinical Social Worker1609357649
  28. Gabriela DiazMarriage & Family Therapist1255986477
  29. Jasmine DiazAddiction (Substance Use Disorder) Counselor1154081644
  30. Karla DiazStudent in an Organized Health Care Education/Training Program1851784920
  31. Manuel DiazAddiction (Substance Use Disorder) Counselor1366802217
  32. Raymond Diaz, P.S.SPeer Specialist1891530655
  33. Sinead DiazCommunity Health Worker1083064604
  34. Tiana DiazAddiction (Substance Use Disorder) Counselor1821688326
  35. Claudia Diaz-Henriquez, LMFTMarriage & Family Therapist1073870911
  36. Tamala Dietrich, LCSWClinical Social Worker1073896478
  37. Rhonda Digiovanni, PSYD, LMFTClinical Psychologist1831344720
  38. Charmaine DillardAddiction (Substance Use Disorder) Counselor1801618582
  39. Kendall DillardClinical Social Worker1013584630
  40. Larrell DillihuntClinical Social Worker1801243852
  41. Becky Dillon, P.T.Physical Therapist1609824945
  42. Zaida Dimanche-Black, MAMarriage & Family Therapist1043827520
  43. Gary DimattioAddiction (Substance Use Disorder) Counselor1609171362
  44. Bonifacio DimayacyacPharmacist1063795391
  45. Sandy Dinh, RPHPharmacist1912504887
  46. Vu Dinh, PHARMDPharmacist1679459309
  47. Aretha DirdenAddiction (Substance Use Disorder) Counselor1285168013
  48. Brian Dirrim, M.F.T.Marriage & Family Therapist1720128382
  49. Antonette DistanPhysical Therapist1023448016
  50. Barbara DixonMarriage & Family Therapist1376711754

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.