NPPES file of Aug 9, 2026

Doctors and health care providers in Lancaster, PA

5,378 individual NPPES records list a practice address in Lancaster, 4th of 816 Pennsylvania cities. The largest group is licensed practical nurse: 366, 7% of the city's records, against 2% across Pennsylvania. Page 72 of 108.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Lancaster

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Lancaster in Pennsylvania

  • Rank in Pennsylvania4th of 816 cities by records
  • Share of the state2.1% of Pennsylvania's records
  • Specialties present25 or more taxonomy codes
  • Top three groups15.5% of all records
  • Licensed Practical Nurse rank2nd of the 10 Pennsylvania cities with the most

Compared with Pennsylvania as a whole, Lancaster has 4.5× the state's share of licensed practical nurse records and 0.60× its share of internal medicine physician records.

Providers in Lancaster, alphabetically

  1. Ruth O'Gara, LCSWClinical Social Worker1700257730
  2. Elizabeth O'Hara, LCSW-CClinical Social Worker1871643106
  3. Kara O'Hara, CRNPFamily Nurse Practitioner1003504093
  4. Lauren O'MalleySpeech-Language Pathologist1447421946
  5. Daniel O'Neill, PSY.D.Clinical Psychologist1710149422
  6. James O'Neill, D.O.Orthopaedic Surgery Physician1396731204
  7. Kelsey O'Shea, DPTPhysical Therapist1851069025
  8. Latrease Oatis, LPNLicensed Practical Nurse1730038597
  9. Brittany OberMental Health Counselor1144010919
  10. Cordell Oberholtzer, BABehavior Analyst1992083455
  11. Consolate Oburu-Bindom, CRNPNurse Practitioner1326478835
  12. Samantha Ochoa, CRNPAcute Care Nurse Practitioner1619744778
  13. Douglas Ockrymiek, DOPsychiatry Physician1194761015
  14. Thomas Oconnor, DOVascular Surgery Physician1144213992
  15. Kerry Odgers, BAAddiction (Substance Use Disorder) Counselor1871973354
  16. Sara Odicio, LCSWClinical Social Worker1700467842
  17. Jennifer Offidani, MSW, LSWSocial Worker1447863030
  18. Kari Oftedal Moreno, MDFamily Medicine Physician1134354087
  19. Peter Ogilvie, CRNACertified Registered Nurse Anesthetist1306557244
  20. Scott Oh, DMDPediatric Dentistry1740779529
  21. David Ohl, ATCAthletic Trainer1700960044
  22. Taylor Ohrum, MSWSocial Worker1215537055
  23. Allison Olajos, LCSWClinical Social Worker1891393153
  24. Jessica Olan, LMT, LEMassage Therapist1558803585
  25. Allegra OldenburgLicensed Practical Nurse1538981303
  26. Stephanie Oldham, MA, LPCCounselor1962053777
  27. Stephen Olin, MDFamily Medicine Physician1548208655
  28. Darlene Oliver, MA, LPCMental Health Counselor1336743947
  29. Marcelino Oliveri, D.O.Orthopaedic Surgery of the Spine Physician1154317105
  30. Amelinda Olivieri, LPCProfessional Counselor1346856911
  31. Debra Olley, NCMT, LMTMassage Therapist1649565680
  32. Lauren OlmsteadPharmacist1275016065
  33. Rebecca Olsen, DNPFamily Nurse Practitioner1578226338
  34. Zachary Olsen, LSWSocial Worker1023749561
  35. Alyesha Olshan, LSW, MSWClinical Social Worker1821406422
  36. Joell OlsonLicensed Practical Nurse1730962903
  37. Treavor Olszewski, M.SBehavior Analyst1568873321
  38. George Olt, MDGynecologic Oncology Physician1033173752
  39. Olaniyi Oluleye, MDPsychiatry Physician1275563140
  40. Ibrahim Omeis, M.D.Neurological Surgery Physician1881866424
  41. Helene Nadine Omikounle, CNANurse's Aide1164249173
  42. David OndrusekPharmacist1790385359
  43. Ying-Lee Ong, D.M.D.Pediatric Dentistry1629338199
  44. Caroline Ongosi, LPNLicensed Practical Nurse1609757426
  45. Stephanie Onguka, M.D.Family Medicine Physician1477769768
  46. Ahunna Onukogu, LPNLicensed Practical Nurse1376287094
  47. Angela Onwuanibe, M.D.Psychiatry Physician1083637441
  48. Zipporah Onyimbo NgaramaClinical Social Worker1467202234
  49. Renee Oplinger, COTA/LOccupational Therapy Assistant1417115098
  50. Rachel OquinnRegistered Nurse1518506179

The largest Pennsylvania cities

  1. Philadelphia42,849
  2. Pittsburgh28,866
  3. Allentown5,904
  4. Erie5,083
  5. Plymouth Meeting5,019

All of Pennsylvania →

How to read this directory

Lancaster, Pennsylvania appears in the CMS National Plan and Provider Enumeration System with 5,378 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 Licensed Practical Nurse (366 clinicians, followed by Professional Counselor with 251 and Physical Therapist with 216). 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 Pennsylvania's population, Lancaster reports roughly 41.5 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.

Of Pennsylvania's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Lancaster practice address, a coverage gap Lancaster patients typically fill by traveling to a larger nearby hub.

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, PA?

There are 5,378 registered healthcare providers in Lancaster, PA, 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 Licensed Practical Nurse, Professional Counselor, Physical Therapist, Family Medicine Physician, Clinical Social Worker. Licensed Practical Nurse has the most providers with 366.

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.