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 78 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. Sheretta Thomas, LCSWClinical Social Worker1881965077
  2. Winona ThomasStudent in an Organized Health Care Education/Training Program1124713094
  3. Addie Thompson, R.A.S.I.Addiction (Substance Use Disorder) Counselor1376761171
  4. Daniel ThompsonCase Manager/Care Coordinator1104142058
  5. Kristen ThompsonMarriage & Family Therapist1285422626
  6. Malaina ThompsonClinical Social Worker1285237768
  7. Traci Thompson, D.D.S.General Practice Dentistry1245413236
  8. Springlen Thompson Smith, CNANurse's Aide1104593623
  9. Ciera ThorntonCommunity Health Worker1538825989
  10. Christie Threatt, BARehabilitation Practitioner1508128349
  11. Juanita ThreetAssistant Behavior Analyst1134074644
  12. Lynne Ticson, M.D.Pediatrics Physician1134245558
  13. Armenta Tiggs-Brown, PAPhysician Assistant1568491314
  14. Nikki Tighe, MFTMarriage & Family Therapist1821157652
  15. Erica TillettClinical Social Worker1184408908
  16. Karen Tison, M.D.Ophthalmology Physician1164476248
  17. January Tiu, FNP-CFamily Nurse Practitioner1427483452
  18. Rosa TojCommunity Health Worker1497438782
  19. Joan TolentinoSpeech-Language Assistant1376970392
  20. Kelly Tomasulo, D.C.Rehabilitation Chiropractor1952538514
  21. Tara TomlinsonStudent in an Organized Health Care Education/Training Program1255768883
  22. John Tookey, DDSDentist1891848537
  23. Shianne Torales, MA MFTMarriage & Family Therapist1972625440
  24. Ana TorresCase Manager/Care Coordinator1477024750
  25. Britney TorresBehavior Technician1649138702
  26. Carol Torres, LCSWClinical Social Worker1770877607
  27. Caroline Torres, ACSWClinical Social Worker1497639348
  28. Daniel TorresAddiction (Substance Use Disorder) Counselor1154836641
  29. Estefani TorresCounselor1164109575
  30. Jennifer Torres, M.A.Marriage & Family Therapist1992223606
  31. Joanna Torres, BACommunity Health Worker1093330896
  32. Lisa TorresAddiction (Substance Use Disorder) Counselor1407591241
  33. Maribel TorresDay Training/Habilitation Specialist1285595959
  34. Pedro TorresCase Manager/Care Coordinator1881331213
  35. Victoria Torres, LSCWClinical Social Worker1396121711
  36. Aileen TorrezRehabilitation Practitioner1730966748
  37. Alexandra TortolaBehavior Technician1790325488
  38. Ashley Toscano, B.ACase Manager/Care Coordinator1568273654
  39. Demetia TownsendAddiction (Substance Use Disorder) Counselor1609251982
  40. Tyler TraceyCommunity Health Worker1144713744
  41. Nicole TracyMarriage & Family Therapist1376070607
  42. Ladeidra Trahan, BARehabilitation Practitioner1740768290
  43. Phuong TranPharmacist1225454911
  44. Tuan Tran, PHARM DPharmacist1346522000
  45. Kathryn Trejo, MAMarriage & Family Therapist1699115709
  46. Rachel TressensCase Manager/Care Coordinator1144345497
  47. Sarah Treusdell, LMFTMarriage & Family Therapist1083733380
  48. Christina Trieu, OTR/LOccupational Therapist1376144840
  49. Michael TrimbleMental Health Counselor1285753327
  50. David TrinhPharmacist1699371617

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.