NPPES file of Aug 9, 2026

Doctors and health care providers in Dayton, OH

12,431 individual NPPES records list a practice address in Dayton, 5th of 711 Ohio cities. The largest group is case manager/care coordinator: 1,218, 10% of the city's records, against 11% across Ohio. Page 164 of 249.

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

Dayton in Ohio

  • Rank in Ohio5th of 711 cities by records
  • Share of the state3.8% of Ohio's records
  • Specialties present25 or more taxonomy codes
  • Top three groups21.6% of all records
  • Case Manager/Care Coordinator rank6th of the 10 Ohio cities with the most

Compared with Ohio as a whole, Dayton has 1.9× the state's share of addiction (substance use disorder) counselor records and 0.50× its share of professional counselor records.

Providers in Dayton, alphabetically

  1. Tabitha Oliver, PHARMDPharmacist1578112512
  2. Crystal Olmstead, PCC#3819ANDLSW#21302Social Worker1639563984
  3. Aarika OlsenClinical Neuropsychologist1871028258
  4. Cynthia Olsen, MDGeriatric Medicine (Family Medicine) Physician1184680910
  5. Kaitlyn OlsenSocial Worker1912521741
  6. Thomas Olsen, MDDermatopathology (Pathology) Physician1023005261
  7. Dettleff Olson, D.O.Family Medicine Physician1497868475
  8. Charlotte Olsten, NP-CNurse Practitioner1588225304
  9. Jennifer Omar, CDCAAddiction (Substance Use Disorder) Counselor1396570222
  10. Abiodun Omoloja, MDPediatric Nephrology Physician1811932767
  11. Julie OmondiBehavior Technician1114508173
  12. Rena Onady, LISW-SClinical Social Worker1316670763
  13. Laurel OnealCase Manager/Care Coordinator1427927284
  14. Lindsey Oneal, CDCAAddiction (Substance Use Disorder) Counselor1144035288
  15. Ivan Ongom, MDHospitalist Physician1659502433
  16. Tommy Onjukka, DDSDentist1245493048
  17. Brian Ontko, P.T.Physical Therapist1033320841
  18. Na'Sha Onuoha, APRN, CNP, PMHNPPsychiatric/Mental Health Nurse Practitioner1326710823
  19. Chidiebele Onwugbenu, PHARMDPharmacist1881211977
  20. Hyacinth OnyekaHome Health Aide1508636234
  21. Ashley OnyiaAddiction (Substance Use Disorder) Counselor1154963635
  22. Swe Zin Mar Winhtut Oo, M.D.Nephrology Physician1396136875
  23. Jane Oosthuizen, DOInternal Medicine Physician1598124646
  24. Bryan Opaskar, PT, DPTPhysical Therapist1134858699
  25. Daniel Opris, D.OInternal Medicine Physician1740547983
  26. Matthew Oram, MDEmergency Medicine Physician1891322285
  27. Nicole Orihood, QMHSBehavior Technician1487147468
  28. Oluremi Oriowo, RNRegistered Nurse1083906457
  29. Sheryll Orlett, P.T.11Physical Therapist1255541306
  30. Mercy Orock, PMHNPRegistered Nurse1518666320
  31. Sarah Orr, ATCAthletic Trainer1063966414
  32. Jasmine Ortiz, MA, SLPSpeech-Language Pathologist1992221691
  33. Luis Ortiz, ATCAthletic Trainer1790999589
  34. Margaret Ortiz, LCDCIIIAddiction (Substance Use Disorder) Counselor1861167405
  35. Marlene OrtizBehavior Technician1285495283
  36. Tyler Ortlieb, ATCAthletic Trainer1528344785
  37. Michael Ortman, DDSGeneral Practice Dentistry1538112669
  38. Emily Orton, CDCAAddiction (Substance Use Disorder) Counselor1487230272
  39. Kimberly Osborn, LSWSocial Worker1699061747
  40. Sydney OsbornCounselor1578391439
  41. Amanda Osborne, DPTPhysical Therapist1851073894
  42. Greg OsborneRegistered Nurse1598637472
  43. Jacqueline Osborne, LPNLicensed Practical Nurse1528293131
  44. Kim Osborne, LCDC IIMental Health Counselor1427543768
  45. Maleah Osborne, LPNLicensed Practical Nurse1598911828
  46. Maria OsborneCase Manager/Care Coordinator1386419216
  47. Jasmine Osborne-SambaBehavior Technician1104318021
  48. Kristy Osgood, DPMFoot & Ankle Surgery Podiatrist1750461943
  49. Richard Oshaughnessy, MDMaternal & Fetal Medicine Physician1285698704
  50. Pamela Oshell, STNAHome Health Aide1073109260

The largest Ohio cities

  1. Columbus36,491
  2. Cincinnati31,362
  3. Cleveland30,748
  4. Toledo13,583
  5. Akron10,950

All of Ohio →

How to read this directory

Dayton, Ohio appears in the CMS National Plan and Provider Enumeration System with 12,431 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 Dayton - 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 Dayton 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 Dayton is weighted toward Case Manager/Care Coordinator (1,218 clinicians, followed by Addiction (Substance Use Disorder) Counselor with 815 and Student in an Organized Health Care Education/Training Program with 652). 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 Ohio's population, Dayton reports roughly 105.5 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.

For Dayton 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 Dayton, OH?

There are 12,431 registered healthcare providers in Dayton, OH, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Dayton?

The most common specialties in Dayton are Case Manager/Care Coordinator, Addiction (Substance Use Disorder) Counselor, Student in an Organized Health Care Education/Training Program, Licensed Practical Nurse, Behavior Technician. Case Manager/Care Coordinator has the most providers with 1,218.

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.