Medicare providers in Colorado

57,802 unique NPIs are enrolled in Medicare in Colorado, number 20 of 51. Practitioners in the 82 specialties tracked here account for 47,550 of them; the largest is nurse practitioner (7,099), and nurse practitioners outnumber family-practice physicians 2.6 to 1.

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1Enrolled NPIs 57,802
2Largest specialty Nurse Practitioner
3Rank of 51 #20
4Specialties present 82

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

Every specialty in Colorado

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

Specialty	CO	Share of US
Nurse Practitioner	7,099	1.9%
Physician Assistant	5,060	2.9%
Physical Therapist in Private Practice	3,251	2.9%
Mental Health Counselor	3,220	4.5%
Clinical Social Worker	2,801	2.8%
Family Practice	2,758	2.4%
Internal Medicine	1,877	1.5%
Emergency Medicine	1,705	2.6%
Anesthesiology	1,281	2.5%
Certified Registered Nurse Anesthetist (CRNA)	1,232	2%
Diagnostic Radiology	1,098	2.9%
Optometry	1,088	2.4%
Clinical Psychologist	1,003	2.7%
Obstetrics/Gynecology	893	2.1%
Chiropractic	807	1.8%
Hospitalist	791	2.7%
Psychiatry	749	2%
Orthopedic Surgery	643	2.4%
General Surgery	639	2.3%
Pediatric Medicine	573	1%
Neurology	558	2.6%
Occupational Therapist in Private Practice	545	2.2%
Ophthalmology	388	1.9%
Cardiovascular Disease (Cardiology)	372	1.5%
Gastroenterology	364	2%
Dermatology	336	2.2%
Certified Nurse Midwife (Cnm)	327	3.4%
Qualified Speech Language Pathologist	321	2.2%
Marriage and Family Therapist	305	2%
Qualified Audiologist	304	2.6%
Pulmonary Disease	289	2.1%
Physical Medicine and Rehabilitation	277	2.5%
Anesthesiology Assistant	272	6%
Pathology	259	1.8%
Podiatry	250	1.4%
Otolaryngology	249	2.2%
Urology	232	2%
Critical Care (Intensivists)	220	2.7%
Hematology/Oncology	215	1.8%
Registered Dietitian or Nutrition Professional	210	1.9%
Neurosurgery	177	2.7%
Infectious Disease	168	2%
Dentist	165	2.7%
Nephrology	157	1.4%
Endocrinology	143	1.7%
Rheumatology	125	2%
Radiation Oncology	117	2%
Interventional Cardiology	115	2%
Medical Oncology	109	2.1%
Plastic and Reconstructive Surgery	102	1.7%
Interventional Radiology	102	2.8%
Vascular Surgery	95	2.1%
Allergy/Immunology	93	2.2%
Thoracic Surgery	93	2.6%
General Practice	73	0.8%
Sports Medicine	71	2.7%
Hospice/Palliative Care	69	2.3%
Cardiac Electrophysiology	60	2%
Geriatric Medicine	59	2.2%
Pain Management	58	1.6%
Certified Clinical Nurse Specialist (Cns)	56	2.5%
Oral Surgery	50	1.4%
Sleep Medicine	44	3.3%
Hand Surgery	42	2.1%
Preventive Medicine	39	3.8%
Osteopathic Manipulative Medicine	38	3.4%
Surgical Oncology	31	1.9%
Gynecological Oncology	29	2.1%
Epileptologists	27	7.5%
Micrographic Dermatologic Surgery (Mds)	22	3.6%
Colorectal Surgery (Proctology)	21	1%
Advanced Heart Failure and Transplant Cardiology	21	2%
Hematology	19	1.4%
Medical Genetics and Genomics	18	3.8%
Cardiac Surgery	15	0.9%
Psychologist Billing Independently	12	1.2%
Interventional Pain Management	11	0.6%
Addiction Medicine	11	1.4%
Nuclear Medicine	11	1.5%
Maxillofacial Surgery	10	0.9%
Neuropsychiatry	10	2.3%
Other (Non-Physician)	1	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.