IA · #30 of 51 by enrolled NPIs

Medicare providers in Iowa

31,447 unique NPIs are enrolled in Medicare in Iowa, number 30 of 51. Practitioners in the 81 specialties tracked here account for 24,777 of them; the largest is nurse practitioner (5,081), and nurse practitioners outnumber family-practice physicians 3.1 to 1.

Look up an NPI

1Enrolled NPIs 31,447
2Largest specialty Nurse Practitioner
3Rank of 51 #30
4Specialties present 81

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

Every specialty in Iowa

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

Specialty	IA	Share of US
Nurse Practitioner	5,081	1.4%
Physician Assistant	1,854	1.1%
Family Practice	1,651	1.4%
Physical Therapist in Private Practice	1,509	1.3%
Chiropractic	1,263	2.8%
Clinical Social Worker	1,120	1.1%
Mental Health Counselor	862	1.2%
Internal Medicine	752	0.6%
Emergency Medicine	752	1.2%
Certified Registered Nurse Anesthetist (CRNA)	732	1.2%
Diagnostic Radiology	677	1.8%
Optometry	602	1.3%
Anesthesiology	565	1.1%
Pediatric Medicine	453	0.8%
Hospitalist	430	1.5%
Obstetrics/Gynecology	393	0.9%
Psychiatry	393	1.1%
Neurology	385	1.8%
Occupational Therapist in Private Practice	362	1.5%
General Surgery	346	1.2%
Orthopedic Surgery	320	1.2%
Cardiovascular Disease (Cardiology)	317	1.3%
Podiatry	233	1.3%
Clinical Psychologist	227	0.6%
Pathology	214	1.5%
Pulmonary Disease	188	1.4%
Qualified Speech Language Pathologist	186	1.3%
Ophthalmology	185	0.9%
Gastroenterology	166	0.9%
Urology	145	1.2%
Otolaryngology	138	1.2%
Qualified Audiologist	127	1.1%
Nephrology	127	1.1%
Marriage and Family Therapist	125	0.8%
Registered Dietitian or Nutrition Professional	121	1.1%
Oral Surgery	114	3.1%
Certified Nurse Midwife (Cnm)	112	1.2%
Dermatology	108	0.7%
Hematology/Oncology	94	0.8%
Interventional Cardiology	90	1.6%
Physical Medicine and Rehabilitation	83	0.8%
Infectious Disease	82	1%
Radiation Oncology	78	1.3%
Thoracic Surgery	72	2%
Endocrinology	70	0.8%
Medical Oncology	68	1.3%
Rheumatology	63	1%
Dentist	61	1%
Neurosurgery	55	0.8%
Critical Care (Intensivists)	54	0.7%
Cardiac Electrophysiology	51	1.7%
Vascular Surgery	48	1%
Interventional Radiology	46	1.3%
Plastic and Reconstructive Surgery	41	0.7%
Allergy/Immunology	39	0.9%
Hand Surgery	35	1.8%
Hospice/Palliative Care	31	1%
General Practice	26	0.3%
Sports Medicine	25	0.9%
Sleep Medicine	21	1.6%
Colorectal Surgery (Proctology)	19	0.9%
Cardiac Surgery	18	1.1%
Hematology	18	1.4%
Pain Management	17	0.5%
Surgical Oncology	15	0.9%
Advanced Heart Failure and Transplant Cardiology	14	1.3%
Epileptologists	13	3.6%
Interventional Pain Management	12	0.7%
Nuclear Medicine	12	1.6%
Geriatric Medicine	11	0.4%
Gynecological Oncology	10	0.7%
Maxillofacial Surgery	9	0.8%
Medical Genetics and Genomics	8	1.7%
Preventive Medicine	7	0.7%
Micrographic Dermatologic Surgery (Mds)	6	1%
Certified Clinical Nurse Specialist (Cns)	5	0.2%
Other (Non-Physician)	5	1.3%
Neuropsychiatry	4	0.9%
Osteopathic Manipulative Medicine	3	0.3%
Addiction Medicine	2	0.3%
Psychologist Billing Independently	1	0.1%

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