NPPES file of Aug 9, 2026

Doctors and health care providers in Cincinnati, OH

31,362 individual NPPES records list a practice address in Cincinnati, 2nd of 711 Ohio cities. The largest group is case manager/care coordinator: 3,811, 12% of the city's records, against 11% across Ohio. Page 412 of 628.

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

The 8 largest groups in Cincinnati

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

Cincinnati in Ohio

  • Rank in Ohio2nd of 711 cities by records
  • Share of the state9.6% of Ohio's records
  • Specialties present25 or more taxonomy codes
  • Top three groups21.5% of all records
  • Case Manager/Care Coordinator rank2nd of the 10 Ohio cities with the most

Compared with Ohio as a whole, Cincinnati has 1.9× the state's share of nurse practitioner records and 0.58× its share of addiction (substance use disorder) counselor records.

Providers in Cincinnati, alphabetically

  1. Michael O'BrienPersonal Care Attendant1902670565
  2. Rachel O'Brien, CNPNurse Practitioner1841711876
  3. Roberta O'Brien, FNPFamily Nurse Practitioner1316330889
  4. Robyn O'Brien, MDHospitalist Physician1629050455
  5. Daryl O'Brien Parr, PH.D., LCSWClinical Social Worker1063836823
  6. Mary O'Bryan, RPHPharmacist1447642426
  7. David O'Connell, MDInternal Medicine Physician1568455335
  8. James O'Connell, LPCMental Health Counselor1538285978
  9. Lili O'ConnellSocial Worker1538047121
  10. Marijo O'Connell, M.A./CCC-SLPSpeech-Language Pathologist1114436318
  11. John O'ConnerOccupational Therapy Assistant1861265241
  12. Patrick O'ConnerMental Health Counselor1831052133
  13. William O'Conner, DDSGeneral Practice Dentistry1174624514
  14. Amy O'Connor, M.A.Audiologist1225466923
  15. Blake O'Connor, MDSurgery Physician1467958587
  16. Christine O'Connor, RDRegistered Dietitian1639136567
  17. Emily O'ConnorSpeech-Language Pathologist1942153614
  18. John O'Connor, M.D.Obstetrics & Gynecology Physician1649245770
  19. Michael O'Connor, MDStudent in an Organized Health Care Education/Training Program1679275267
  20. Patrick O'Connor, D.D.S.General Practice Dentistry1063421139
  21. Shannon O'Connor, MD, PHDPediatric Rheumatology Physician1013573351
  22. Shari O'Connor, APRNFamily Nurse Practitioner1427508803
  23. Patrick O'Daniel, M.D.Hospitalist Physician1144255282
  24. Christine O'Dea, MDFamily Medicine Physician1467605469
  25. James O'Dea, M.D.Family Medicine Physician1013165174
  26. Peggy Maloy O'DellHomemaker1760128458
  27. Rebecca O'Der, C.F.N.P.Family Nurse Practitioner1790873495
  28. Brooke O'Donnell, CDCAAddiction (Substance Use Disorder) Counselor1548057961
  29. Erin O'Donnell, M.D.Pediatrics Physician1346660917
  30. Michelle O'Donnell, PA-CPhysician Assistant1477830974
  31. Robert O'Donnell, MDCardiovascular Disease Physician1629090006
  32. Kristen O'DriscollSpeech-Language Pathologist1033674239
  33. Cara O'GradyOccupational Therapist1740757988
  34. Janet O'Hair, LISWSocial Worker1003967498
  35. Matthew O'HaraCase Manager/Care Coordinator1326554171
  36. Nicole O'HaraPhysical Therapist1326325036
  37. Sara O'Hara, MDPediatric Radiology Physician1447344874
  38. Elizabeth O'HarraCase Manager/Care Coordinator1154114668
  39. Greg O'HearnPeer Specialist1871430751
  40. Holly O'Keefe, P.T.Physical Therapist1376799411
  41. Kathryn O'Keefe, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1407052723
  42. Lauren O'Keefe, MS, LPCCProfessional Counselor1427436336
  43. Brittni O'LearyMaternal Newborn Registered Nurse1407314776
  44. Mary O'Leary, RNRegistered Nurse1194024489
  45. Matthew O'Leary, MDStudent in an Organized Health Care Education/Training Program1881487825
  46. Meghann O'LearyCase Manager/Care Coordinator1467741637
  47. Michael O'Leary, CPHTPharmacy Technician1023817798
  48. Timothy O'Leary, O.D.Optometrist1356428791
  49. Jessica O'Maley, BACase Manager/Care Coordinator1700395134
  50. Megan O'Maley, CNPNurse Practitioner1194240622

The largest Ohio cities

  1. Columbus36,491
  2. Cleveland30,748
  3. Toledo13,583
  4. Dayton12,431
  5. Akron10,950

All of Ohio →

How to read this directory

Cincinnati, Ohio appears in the CMS National Plan and Provider Enumeration System with 31,362 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 Cincinnati - 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 Cincinnati 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 Cincinnati is weighted toward Case Manager/Care Coordinator (3,811 clinicians, followed by Student in an Organized Health Care Education/Training Program with 1,758 and Social Worker with 1,184). 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, Cincinnati reports roughly 266.1 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 Cincinnati 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 Cincinnati, OH?

There are 31,362 registered healthcare providers in Cincinnati, OH, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Cincinnati?

The most common specialties in Cincinnati are Case Manager/Care Coordinator, Student in an Organized Health Care Education/Training Program, Social Worker, Clinical Social Worker, Licensed Practical Nurse. Case Manager/Care Coordinator has the most providers with 3,811.

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.