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 79 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. Loan Trinh, O.DOptometrist1992091243
  2. Bruce TripoliSonography Radiologic Technologist1144437823
  3. Marsha Trochim, RN NPAmbulatory Women's Health Care Registered Nurse1508962127
  4. Alfred TrolingerAddiction (Substance Use Disorder) Counselor1427711977
  5. Harold Truitt, D.D.S.General Practice Dentistry1497880629
  6. Gloria TrujilloAddiction (Substance Use Disorder) Counselor1063714269
  7. Melyssa TrujilloBehavior Technician1477386803
  8. Nathan TrujilloStudent in an Organized Health Care Education/Training Program1073843413
  9. Tiffany Truss-Cole, LMFTMarriage & Family Therapist1063847036
  10. Tiffany Tsai, M.D.Psychiatry Physician1043483431
  11. Dennis Tse, M.D.Nephrology Physician1447360508
  12. Geoffrey Tsoi, DOFamily Medicine Physician1497100606
  13. Zhongheng Tu, M.D.Family Medicine Physician1962625459
  14. Sheila Tuck, LVNLicensed Vocational Nurse1205283751
  15. Dion TuckerDay Training/Habilitation Specialist1356175780
  16. Paula Tucker, SUDRCAddiction (Substance Use Disorder) Counselor1780374454
  17. Christina TunstallDay Training/Habilitation Specialist1063174506
  18. Rebeca TurciosPeer Specialist1104697747
  19. Vanatie TurciosPeer Specialist1831988484
  20. Riley TurkMarriage & Family Therapist1104712819
  21. Debra Turkal, BACase Manager/Care Coordinator1972813889
  22. Anadora TurnerClinical Social Worker1255085635
  23. Andrew Turner, M.D.Psychiatry Physician1699069724
  24. Antoinette Turner, MSW.Social Worker1912550682
  25. Brandi TurnerTechnician/Technologist1164923397
  26. Renee TurnerLicensed Vocational Nurse1881317972
  27. Shannon TurnerRehabilitation Practitioner1457852428
  28. Melanie Tuscani, NPSS-PNSBOTPeer Specialist1942159090
  29. Donald TweedieClinical Psychologist1952744401
  30. Tiana TweedieBehavior Technician1447718119
  31. Vivaik Tyagi, M.D.Gastroenterology Physician1073612545
  32. Lacresha TylerRehabilitation Practitioner1629565445
  33. Kathleen Tyndall, P.A.Physician Assistant1366445157
  34. Denisha TynesCommunity Health Worker1003635053
  35. Maple Tyson, LCSWClinical Social Worker1235258666
  36. Lacee UdagerCase Manager/Care Coordinator1487962858
  37. Ndidiamaka Udeh, N.PFamily Nurse Practitioner1194269993
  38. Chijioke UgochukwuAddiction (Substance Use Disorder) Counselor1891942884
  39. Swati Upadhya, FNP-CFamily Nurse Practitioner1265247126
  40. Miranda UrbanCase Manager/Care Coordinator1619772613
  41. Karen UrenaAddiction (Substance Use Disorder) Counselor1003578535
  42. Melina UriasCase Manager/Care Coordinator1861379455
  43. Ana Uribe, FNP-BCFamily Nurse Practitioner1720853096
  44. Susan UribeRegistered Respiratory Therapist1013554559
  45. Veronica UribeCounselor1932906542
  46. Diana Uribe-Tanus, RDNRegistered Dietitian1780069054
  47. Ivonne UsagaStudent in an Organized Health Care Education/Training Program1699625400
  48. Raquel Usher, RN, BSNAdult Psychiatric/Mental Health Registered Nurse1255014056
  49. Nila Ussery, RNCase Management Registered Nurse1235477209
  50. Tederhi Usude, DDSGeneral Practice Dentistry1023131455

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.