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 34 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. David HarrisPeer Specialist1497633697
  2. Erica HarrisPeer Specialist1548864887
  3. Leonard HarrisRehabilitation Practitioner1265084925
  4. Nerissa HarrisBehavior Technician1043957061
  5. Wakeisha Harris, LVNLicensed Vocational Nurse1497291140
  6. Willie Harris, ASWClinical Social Worker1346736212
  7. Eugene Harris IIAddiction (Substance Use Disorder) Counselor1619095445
  8. Jase HarrisonProfessional Counselor1912838269
  9. Ronald Harrison, REG RECOVERY WORKERAddiction (Substance Use Disorder) Counselor1578003331
  10. Rhonda Hart, ACSWClinical Social Worker1710004254
  11. Jasmine Hart-AlvarezDay Training/Habilitation Specialist1154127785
  12. Linda Hart-SicklerCommunity Health Worker1376382325
  13. Drew Hartenstein, PTPhysical Therapist1265467039
  14. Elizabeth Hartley, MABehavior Analyst1487358479
  15. John HartleyPharmacist1417496928
  16. Janai HarveyPeer Specialist1275219362
  17. Keith HarveyCase Manager/Care Coordinator1053571729
  18. Tiffany Harvey, PSY.D.Psychologist1902283278
  19. Syed Hasan, MDSpecialist1528010998
  20. Taoheed Hasan, PHARMACISTPharmacist1114010527
  21. Ray Hashemi, MD PHDDiagnostic Radiology Physician1851355473
  22. Shahid Hassan, M.D.Internal Medicine Physician1851401988
  23. Jacqueline Hattar, PA-CMedical Physician Assistant1821438318
  24. Tonieka HauckAddiction (Substance Use Disorder) Counselor1447791389
  25. Christian Hauser, P.A-CMedical Physician Assistant1003878950
  26. Jenna HaussStudent in an Organized Health Care Education/Training Program1659704112
  27. Haykuhi HavanjyanPharmacist1316487564
  28. Shauna Havlina, MS LMFTMarriage & Family Therapist1982851523
  29. Era HawkPsychiatric/Mental Health Registered Nurse1174222129
  30. Carol Hawkins, PTPhysical Therapist1033194121
  31. Talor Hawkins, LCSWClinical Social Worker1972152890
  32. Jamie HawksMarriage & Family Therapist1427274661
  33. Daphine HayesAddiction (Substance Use Disorder) Counselor1386372357
  34. Derrick HayesMental Health Counselor1548195902
  35. Emilia HayesCase Manager/Care Coordinator1073782041
  36. Hugh Hayes, LCSW, CADC IISocial Worker1518142983
  37. Kellar HayesBehavior Technician1144103680
  38. Ryan HayesClinical Social Worker1174033328
  39. Mikayla HaymanBehavior Technician1154023828
  40. Tawnny HaymondMarriage & Family Therapist1558679217
  41. Charlisa HaynesRehabilitation Practitioner1447529268
  42. Mary Haynes, F.N.P.Family Nurse Practitioner1902896921
  43. Ruth Healy, RADTAddiction (Substance Use Disorder) Counselor1366167850
  44. Cadrena HeardClinical Social Worker1528880465
  45. Yolanda Heath, CNMAdvanced Practice Midwife1780394114
  46. Tyler HeckathornSpeech-Language Pathologist1225965221
  47. Amy Heibel, LCSWClinical Social Worker1548949050
  48. Lauren HeidelbergCommunity Health Worker1710345855
  49. Sheryl Heidt, M.A. CCC-SLP 6590Speech-Language Pathologist1619260544
  50. Sara Hein, APCC 12455Professional Counselor1427534080

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.