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 64 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. Govardan RamirezRegistered Nurse1720716301
  2. Jennifer RamirezRehabilitation Practitioner1013756840
  3. Josephine Norma Ramirez, RNRegistered Nurse1215354428
  4. Karla RamirezCase Manager/Care Coordinator1962050815
  5. Luis D RamirezMarriage & Family Therapist1285894642
  6. Monica RamirezAddiction (Substance Use Disorder) Counselor1568251494
  7. Nicole RamirezCase Manager/Care Coordinator1518438993
  8. Olga Ramirez, RNFamily Nurse Practitioner1144027939
  9. Rosemary Ramirez, LMTMassage Therapist1134981624
  10. Sean RamirezStudent in an Organized Health Care Education/Training Program1457244410
  11. Sheily RamirezBehavior Technician1962216788
  12. Vanessa Ramirez, ACSWClinical Social Worker1508517145
  13. Yesenia RamirezCase Manager/Care Coordinator1982351169
  14. Karen Ramirez MoralesCommunity Health Worker1053946657
  15. Alberto RamosPhysical Therapy Assistant1518602242
  16. April RamosCommunity Health Worker1790529675
  17. Darryl RamosBehavior Technician1831773191
  18. Jose RamosStudent in an Organized Health Care Education/Training Program1720821606
  19. Krystal-Rose Ramos, BACase Manager/Care Coordinator1083084370
  20. Nancy RamosCommunity Health Worker1356142111
  21. Yuri RamosCase Manager/Care Coordinator1598250102
  22. Christine Ramsey, R.N.Child & Adolescent Psychiatric/Mental Health Registered Nurse1235493156
  23. Rachel RamseyCommunity Health Worker1821456963
  24. Arnold RanarioPhysical Therapy Assistant1013898766
  25. Kitcha Ranch, MDEmergency Medicine Physician1053357681
  26. Onnikah Randolph, MSWMental Health Counselor1952583452
  27. Denise RangelCase Manager/Care Coordinator1558605832
  28. Elizabeth RangelDay Training/Habilitation Specialist1861816829
  29. Erica RangelPharmacy Technician1699477182
  30. Rosa RangelCase Manager/Care Coordinator1730624552
  31. Saima Rashid, D.O.Internal Medicine Physician1689836736
  32. Wendy Raskey, PHDClinical Psychologist1144419615
  33. Timothy RasmussenAthletic Trainer1962238436
  34. David RavaPharmacist1891195707
  35. Kalpana Ravikumar, MDPhysical Medicine & Rehabilitation Physician1821008111
  36. Aramis RayfordAddiction (Substance Use Disorder) Counselor1578445847
  37. Tradena Rayner, MS, RDN, CDNRegistered Dietitian1326463704
  38. Ashley RealesBehavior Technician1053031906
  39. Neric RebollarBehavior Analyst1174082671
  40. Noel RebollarBehavior Technician1528773272
  41. Sheryl Recinos, MDFamily Medicine Physician1629483417
  42. Kevin ReddigPhysical Therapy Assistant1659016392
  43. Portia Reddy, LMFTMental Health Counselor1912588492
  44. Demeiia Reese, CAMS-ICase Manager/Care Coordinator1629528039
  45. Jacqueline Reese, PSYD., LMFTMarriage & Family Therapist1770765430
  46. Jeremymark ReesePeer Specialist1124817234
  47. Rosa RegaladoPeer Specialist1518228766
  48. Ronald Reichman, M.D.Rheumatology Physician1487625562
  49. Cathy ReillyCommunity Health Worker1790805547
  50. Oscar RenderosBehavior Technician1376315341

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.