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 71 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. Robin Schaefer, R.N., F.N.P.Family Nurse Practitioner1710013362
  2. Sandy Schaller, MS, MFTMarriage & Family Therapist1265564801
  3. Amy Schaus, RNPediatric Registered Nurse1295413003
  4. David ScheivertCase Manager/Care Coordinator1285890160
  5. Jason SchenewarkAddiction (Substance Use Disorder) Counselor1669070025
  6. Rebecca SchenkBehavior Technician1225756356
  7. Carmen Schiltz, FNPFamily Nurse Practitioner1396270542
  8. Emma SchmidtBehavior Technician1083563662
  9. Jessica Schmidt, RNRegistered Nurse1942973607
  10. Hans Schoellhammer, MDSurgical Oncology Physician1861684938
  11. Lauren Schoenemann, M.S.Marriage & Family Therapist1871612747
  12. Michele Schottelkorb, APCCMental Health Counselor1235980392
  13. Maureen SchraderAddiction (Substance Use Disorder) Counselor1871774364
  14. Jocelyn SchroederBehavior Technician1184183451
  15. Dawn Schultz, RNFARegistered Nurse First Assistant1265403091
  16. Kristina Schultz, MSN, APRN, FNP-BCFamily Nurse Practitioner1902643596
  17. Jessica Schumacher, LCSWClinical Social Worker1518557537
  18. Kathleen SchuolerBehavior Technician1407585185
  19. Sarah Schupack, M.S. MFTMarriage & Family Therapist1396035234
  20. Katherine Schwegel, NPNurse Practitioner1316958341
  21. Aaron Scott, M.D.Surgical Oncology Physician1295115814
  22. Chad ScottRehabilitation Practitioner1578694535
  23. Helen ScottCounselor1427208685
  24. Jessica ScottClinical Social Worker1619424652
  25. Landis ScottDay Training/Habilitation Specialist1831938141
  26. Michelle Scott, MFTIMental Health Counselor1538596978
  27. Simone Scott, LCSWClinical Social Worker1811133986
  28. Vincent ScribnerAddiction (Substance Use Disorder) Counselor1356627202
  29. Jinu Sebastian, NPNurse Practitioner1760134076
  30. Sonja Seeber, ASWClinical Social Worker1164628905
  31. Emily SeeversBehavior Analyst1306360623
  32. Noe SegoviaPeer Specialist1265381602
  33. Rachel SegoviaCommunity Health Worker1437784782
  34. Relly Mer Segovia, AGACNP-BCAcute Care Nurse Practitioner1780303248
  35. Shawn SeguraMental Health Counselor1538031208
  36. Susan SeguraAssistive Technology Practitioner Rehabilitation Counselor1821457466
  37. Wendy SeibelStudent in an Organized Health Care Education/Training Program1770779837
  38. Deisy SeibertBehavior Analyst1316489057
  39. Prabdeep SekhonDentist1245793215
  40. Efua Sekyi-AppiahPharmacist1265185102
  41. Margo Sellers, MFTIMarriage & Family Therapist1952505224
  42. Sangar Selva, MDInternal Medicine Physician1114957925
  43. Ivy Semenez, M.D.Internal Medicine Physician1114154291
  44. Lisa Senette-Harris, BA SOCIOLOGYRehabilitation Practitioner1083987812
  45. Kayleen Sepulveda HernandezBehavior Technician1467286567
  46. Juan Serna Ramirez, LCSWClinical Social Worker1487505756
  47. Emilio SerranoAddiction (Substance Use Disorder) Counselor1104245059
  48. Sueling SerranoRehabilitation Practitioner1669030839
  49. Yenifer SerranoBehavior Technician1255157707
  50. Julian Serrano MoranBehavior Technician1912835554

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.