Medicare providers in Arizona

59,145 unique NPIs are enrolled in Medicare in Arizona, number 19 of 51. Practitioners in the 82 specialties tracked here account for 47,667 of them; the largest is nurse practitioner (9,848), and nurse practitioners outnumber family-practice physicians 4.3 to 1.

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1Enrolled NPIs 59,145
2Largest specialty Nurse Practitioner
3Rank of 51 #19
4Specialties present 82

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

Every specialty in Arizona

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

Specialty	AZ	Share of US
Nurse Practitioner	9,848	2.7%
Physician Assistant	4,426	2.6%
Physical Therapist in Private Practice	3,212	2.8%
Internal Medicine	2,805	2.2%
Family Practice	2,289	2%
Emergency Medicine	1,787	2.8%
Diagnostic Radiology	1,579	4.1%
Anesthesiology	1,519	3%
Certified Registered Nurse Anesthetist (CRNA)	1,381	2.2%
Mental Health Counselor	1,270	1.8%
Clinical Social Worker	1,219	1.2%
Optometry	1,004	2.2%
Pediatric Medicine	926	1.6%
Chiropractic	836	1.8%
Obstetrics/Gynecology	823	1.9%
Psychiatry	696	1.9%
General Surgery	669	2.4%
Neurology	626	2.9%
Hospitalist	618	2.1%
Orthopedic Surgery	615	2.3%
Cardiovascular Disease (Cardiology)	571	2.3%
Clinical Psychologist	532	1.5%
Occupational Therapist in Private Practice	519	2.1%
Registered Dietitian or Nutrition Professional	469	4.1%
Qualified Speech Language Pathologist	440	3.1%
Podiatry	421	2.4%
Gastroenterology	416	2.3%
Dermatology	391	2.6%
Ophthalmology	371	1.8%
Pathology	371	2.5%
Hematology/Oncology	294	2.4%
Nephrology	293	2.6%
Urology	272	2.3%
Pulmonary Disease	263	1.9%
Qualified Audiologist	259	2.2%
Critical Care (Intensivists)	250	3.1%
Otolaryngology	215	1.9%
Physical Medicine and Rehabilitation	204	1.9%
Interventional Cardiology	196	3.4%
Infectious Disease	181	2.2%
Certified Nurse Midwife (Cnm)	176	1.8%
Radiation Oncology	163	2.8%
Neurosurgery	161	2.4%
Endocrinology	142	1.7%
General Practice	137	1.5%
Plastic and Reconstructive Surgery	128	2.2%
Marriage and Family Therapist	122	0.8%
Dentist	116	1.9%
Vascular Surgery	115	2.5%
Pain Management	107	2.9%
Interventional Radiology	105	2.9%
Rheumatology	97	1.5%
Allergy/Immunology	87	2.1%
Thoracic Surgery	77	2.1%
Cardiac Electrophysiology	76	2.5%
Medical Oncology	72	1.4%
Hospice/Palliative Care	65	2.2%
Hand Surgery	59	3%
Oral Surgery	54	1.5%
Colorectal Surgery (Proctology)	54	2.6%
Interventional Pain Management	53	3%
Sports Medicine	43	1.6%
Cardiac Surgery	42	2.5%
Geriatric Medicine	38	1.4%
Surgical Oncology	36	2.2%
Sleep Medicine	36	2.7%
Other (Physician)	33	6.4%
Gynecological Oncology	25	1.8%
Preventive Medicine	20	1.9%
Osteopathic Manipulative Medicine	19	1.7%
Other (Non-Physician)	19	4.8%
Nuclear Medicine	18	2.4%
Maxillofacial Surgery	13	1.2%
Micrographic Dermatologic Surgery (Mds)	13	2.1%
Epileptologists	13	3.6%
Hematology	10	0.8%
Psychologist Billing Independently	9	0.9%
Addiction Medicine	9	1.1%
Medical Genetics and Genomics	9	1.9%
Advanced Heart Failure and Transplant Cardiology	7	0.7%
Neuropsychiatry	7	1.6%
Certified Clinical Nurse Specialist (Cns)	6	0.3%

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