OH · #7 of 51 by enrolled NPIs

Medicare providers in Ohio

109,337 unique NPIs are enrolled in Medicare in Ohio, number 7 of 51. Practitioners in the 83 specialties tracked here account for 87,748 of them; the largest is nurse practitioner (19,612), and nurse practitioners outnumber family-practice physicians 4.4 to 1.

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1Enrolled NPIs 109,337
2Largest specialty Nurse Practitioner
3Rank of 51 #7
4Specialties present 83

Medicare-enrolled practitioners in Ohio by specialty, 15 largest, bars to scale. Source: CMS PPEF, 2026-09-29.

Every specialty in Ohio

Each figure is the number of NPIs enrolled in Medicare in Ohio under that specialty, beside its share of the specialty's national total.

Specialty	OH	Share of US
Nurse Practitioner	19,612	5.4%
Physician Assistant	6,009	3.5%
Internal Medicine	4,874	3.8%
Family Practice	4,492	3.9%
Clinical Social Worker	4,099	4.1%
Mental Health Counselor	3,768	5.2%
Certified Registered Nurse Anesthetist (CRNA)	3,568	5.7%
Emergency Medicine	3,296	5.1%
Physical Therapist in Private Practice	2,539	2.2%
Pediatric Medicine	2,421	4.3%
Diagnostic Radiology	2,179	5.7%
Anesthesiology	2,059	4.1%
Optometry	1,874	4.1%
Obstetrics/Gynecology	1,675	4%
Chiropractic	1,529	3.3%
Psychiatry	1,378	3.7%
Clinical Psychologist	1,375	3.8%
Neurology	1,268	5.9%
General Surgery	1,168	4.2%
Orthopedic Surgery	1,095	4.1%
Hospitalist	1,067	3.6%
Cardiovascular Disease (Cardiology)	1,067	4.3%
Gastroenterology	818	4.5%
Podiatry	808	4.6%
Ophthalmology	786	3.8%
Pathology	726	4.9%
Pulmonary Disease	675	5%
Occupational Therapist in Private Practice	575	2.3%
Hematology/Oncology	561	4.6%
Dermatology	536	3.6%
Qualified Audiologist	517	4.4%
Nephrology	496	4.5%
Urology	492	4.2%
Anesthesiology Assistant	478	10.5%
Otolaryngology	461	4%
Physical Medicine and Rehabilitation	442	4%
Certified Nurse Midwife (Cnm)	416	4.3%
Qualified Speech Language Pathologist	398	2.8%
Registered Dietitian or Nutrition Professional	395	3.5%
Critical Care (Intensivists)	356	4.4%
Infectious Disease	348	4.2%
Endocrinology	334	4%
Radiation Oncology	299	5.1%
Certified Clinical Nurse Specialist (Cns)	292	13.1%
Neurosurgery	283	4.3%
Rheumatology	249	4%
Plastic and Reconstructive Surgery	245	4.2%
Vascular Surgery	241	5.2%
Interventional Cardiology	235	4.1%
Dentist	207	3.4%
Thoracic Surgery	184	5.1%
Allergy/Immunology	170	4%
Medical Oncology	168	3.3%
Cardiac Electrophysiology	164	5.4%
Pain Management	151	4.1%
Hospice/Palliative Care	151	5.1%
Sports Medicine	149	5.6%
General Practice	144	1.5%
Interventional Radiology	128	3.5%
Marriage and Family Therapist	111	0.7%
Oral Surgery	103	2.8%
Colorectal Surgery (Proctology)	97	4.7%
Cardiac Surgery	93	5.5%
Geriatric Medicine	84	3.2%
Hematology	84	6.4%
Hand Surgery	81	4.1%
Sleep Medicine	80	6%
Addiction Medicine	77	9.7%
Surgical Oncology	64	4%
Advanced Heart Failure and Transplant Cardiology	58	5.5%
Gynecological Oncology	54	4%
Interventional Pain Management	41	2.3%
Other (Non-Physician)	36	9.1%
Maxillofacial Surgery	35	3.2%
Nuclear Medicine	30	4.1%
Osteopathic Manipulative Medicine	24	2.1%
Preventive Medicine	24	2.3%
Medical Genetics and Genomics	23	4.9%
Epileptologists	19	5.3%
Micrographic Dermatologic Surgery (Mds)	17	2.8%
Neuropsychiatry	11	2.5%
Psychologist Billing Independently	7	0.7%
Other (Physician)	5	1%

Source: CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29; unique NPIs per state. Checked 2026-10-24. Methodology.