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 45 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. Mariah Leonetti Ford, NONEBehavior Technician1316668106
  2. Jessica Leslie, CASE MANAGERMental Health Counselor1346414984
  3. Andrew Lesser, M.D.Emergency Medicine Physician1952326381
  4. Christina Lessley, RDNRegistered Dietitian1760186910
  5. Deborah Lettau, SUDCC II 17875Addiction (Substance Use Disorder) Counselor1710806419
  6. Peggy Leugue, FNPFamily Nurse Practitioner1821573981
  7. Pak Yan Leung, A.S.W.Mental Health Counselor1093055519
  8. Joseph LevinsonBehavior Technician1447818125
  9. Latease Levye, LVNLicensed Vocational Nurse1689235129
  10. Bria LewisMarriage & Family Therapist1124736061
  11. Cindy LewisLicensed Vocational Nurse1235093329
  12. Corey Lewis, LVNLicensed Vocational Nurse1851805881
  13. Jermaine LewisCounselor1760514079
  14. Jerry Lewis, MS, ATC,EMT--1AOther Technician1710050547
  15. Judith Lewis, FNPNurse Practitioner1588364640
  16. Natalie Lewis, R.N., N.P.Nurse Practitioner1548398670
  17. Nina LewisLicensed Vocational Nurse1144613076
  18. Page Lewis, PHDClinical Psychologist1871503250
  19. Tricia LewisCase Manager/Care Coordinator1144521477
  20. Marco LeyvaSocial Worker1912383860
  21. Ai Li, PHARMDPharmacist1376823906
  22. Nathan Li, DDSGeneral Practice Dentistry1144316571
  23. Wan Chen LiPhysical Therapist1336823293
  24. Yong Li, LCSWClinical Social Worker1497598718
  25. Victor Liao, DOInternal Medicine Physician1760007116
  26. Mary Ann LibetaRegistered Nurse First Assistant1366782823
  27. Erin LightbournBehavior Technician1093390858
  28. Aretha Lightner, ADMINISTRATORNursing Home Administrator1649781139
  29. Liza LillyRehabilitation Practitioner1518225085
  30. Rosalind Lilly, R.N., N.P.Nurse Practitioner1073643284
  31. Charles Lim, M.D.Internal Medicine Physician1205947231
  32. Lauren Lim, AMFTMarriage & Family Therapist1235957622
  33. Trevor Lim, M.D.Radiation Oncology Physician1669546164
  34. Karla LimaMarriage & Family Therapist1538645296
  35. Katherine LimaBehavior Technician1083437636
  36. Joseph Limon, D.C.Chiropractor1508976911
  37. Chih-Ting LinOccupational Therapist1871178954
  38. Chin Pu Lin, PHYSICAL THERAPISTPhysical Therapist1194536912
  39. Mingxin LinPharmacist1598615494
  40. Elsa LinaresMental Health Counselor1154830115
  41. Manrique LinaresCommunity Health Worker1699204388
  42. Ronald Linares, RPT, MPTPhysical Therapist1316238454
  43. Amber LindnerAudiologist-Hearing Aid Fitter1477833978
  44. Zariel Lindsey, LVNLicensed Vocational Nurse1659206803
  45. Stephanie LinkAddiction (Substance Use Disorder) Counselor1619898822
  46. Gina LinstromCase Manager/Care Coordinator1083993794
  47. Sanya LitchProfessional Counselor1194101162
  48. Claudia LittleAddiction (Substance Use Disorder) Counselor1558773424
  49. Lasheieka LittleRehabilitation Practitioner1063715316
  50. Jerry Livesay, PH.D.Psychologist1841530383

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.