Doctors in Colorado: 13,265 enrolled in Medicare
Colorado has 13,265 MD and DO clinicians enrolled in Medicare in the CMS file dated Aug 18, 2026: 223 per 100,000 residents, 21st of 51 (the states and DC), against 214 for the US. The most are in Aurora, 2,105 in our physician files. Per capita Colorado is strongest in sports medicine physicians (4th, 1.1 per 100,000).
By Ryan Doyle, founder of Doctor Email List. Published Oct 5, 2026.
Colorado physicians by specialty
Every specialty with at least one clinician in Colorado, largest first. Rank is among the states and DC (51 in all) by clinicians per 100,000 residents. Where we have a state page or a list for the specialty, the name links to it.
| Specialty | Colorado | Per 100,000 | Rank | US per 100,000 |
|---|---|---|---|---|
| Nurse Practitioners | 4,675 | 78.5 | 39th | 83.7 |
| Physician Assistants | 3,789 | 63.6 | 11th | 40.8 |
| Family Physicians | 2,119 | 35.6 | 16th | 28.7 |
| Internal Medicine Physicians | 1,358 | 22.8 | 36th | 30.9 |
| Emergency Physicians | 948 | 15.9 | 16th | 13.5 |
| Anesthesiologists | 940 | 15.8 | 11th | 13.3 |
| Optometrists | 810 | 13.6 | 19th | 10.9 |
| Radiologists | 743 | 12.5 | 13th | 11.1 |
| Chiropractors | 677 | 11.4 | 27th | 11.8 |
| Hospitalists | 610 | 10.2 | 11th | 7.1 |
| OB/GYNs | 607 | 10.2 | 25th | 10.1 |
| Orthopedic Surgeons | 541 | 9.1 | 12th | 7.4 |
| General Surgeons | 472 | 7.9 | 16th | 6.9 |
| Cardiologists | 424 | 7.1 | 33rd | 8.7 |
| Psychiatrists | 415 | 7.0 | 31st | 8.4 |
| Neurologists | 321 | 5.4 | 22nd | 5.5 |
| Ophthalmologists | 318 | 5.3 | 17th | 5.3 |
| Oncologists | 304 | 5.1 | 20th | 5.0 |
| Dermatologists | 278 | 4.7 | 10th | 4.0 |
| Gastroenterologists | 265 | 4.4 | 22nd | 4.7 |
| Pulmonologists | 227 | 3.8 | 16th | 3.4 |
| Physiatrists | 220 | 3.7 | 8th | 2.7 |
| Podiatrists | 217 | 3.6 | 30th | 4.7 |
| Pathologists | 199 | 3.3 | 33rd | 3.8 |
| ENTs | 197 | 3.3 | 14th | 2.9 |
| Urologists | 180 | 3.0 | 27th | 3.0 |
| Critical care physicians | 145 | 2.4 | 9th | 1.8 |
| Nephrologists | 137 | 2.3 | 38th | 2.9 |
| Infectious Disease Physicians | 134 | 2.2 | 15th | 2.1 |
| Neurosurgeons | 118 | 2.0 | 13th | 1.7 |
| Endocrinologists | 111 | 1.9 | 23rd | 2.1 |
| Rheumatologists | 104 | 1.7 | 16th | 1.6 |
| Pediatricians | 102 | 1.7 | 50th | 3.8 |
| Radiation Oncologists | 91 | 1.5 | 30th | 1.6 |
| Plastic Surgeons | 75 | 1.3 | 27th | 1.4 |
| Allergists | 66 | 1.1 | 18th | 1.1 |
| Sports medicine physicians | 63 | 1.1 | 4th | 0.7 |
| Cardiothoracic Surgeons | 62 | 1.0 | 33rd | 1.2 |
| Vascular Surgeons | 60 | 1.0 | 38th | 1.2 |
| Pain Management Physicians | 51 | 0.9 | 43rd | 1.4 |
| Hospice and palliative care physicians | 51 | 0.9 | 11th | 0.7 |
| Geriatric medicine physicians | 48 | 0.8 | 15th | 0.6 |
| General practice physicians | 46 | 0.8 | 27th | 1.2 |
| Sleep medicine physicians | 34 | 0.6 | 2nd | 0.3 |
| Osteopathic manipulative medicine physicians | 31 | 0.5 | 11th | 0.3 |
| Micrographic dermatologic surgeons | 22 | 0.4 | 2nd | 0.2 |
| Colorectal surgeons | 20 | 0.3 | 38th | 0.5 |
| Preventive medicine physicians | 16 | 0.3 | 5th | 0.2 |
| Hematologists | 13 | 0.2 | 26th | 0.3 |
| Addiction medicine physicians | 8 | 0.1 | 27th | 0.2 |
| Nuclear medicine physicians | 7 | 0.1 | 27th | 0.2 |
Counts are one row per NPI under the clinician's primary Medicare specialty, from the CMS file dated Aug 18, 2026. Rates use the Census Bureau's July 2024 estimate for Colorado. Nurse practitioners, physician assistants, chiropractors and optometrists have their own files and are not in the MD and DO total. Colorado ranks lowest per capita in pediatricians (50th, 1.7 per 100,000).
Where Colorado physicians practice
In the 12,197 clinicians Colorado has across the physician specialty files we sell, counted once each, 40% are women and 27% offer telehealth. The median graduation year is 2007. These are the cities with the most of them.
| City | Clinicians | Share of Colorado |
|---|---|---|
| Aurora | 2,105 | 17% |
| Denver | 1,934 | 16% |
| Colorado Springs | 899 | 7.4% |
| Castle Rock | 516 | 4.2% |
| Fort Collins | 461 | 3.8% |
Largest practice groups in Colorado
Groups ranked by the number of Colorado clinicians the CMS file lists under them. 78% of Colorado physicians with a group on file are in a group of 50 or more listed clinicians, against 80% across the US.
| Practice or health system, as CMS prints it | Colorado clinicians listed |
|---|---|
| University Physicians Incorporated | 1,568 |
| Poudre Valley Medical Group LLC | 1,097 |
| Colorado Permanente Medical Group PC | 907 |
| Catholic Health Initiatives Colorado | 454 |
| Denver Health and Hospital Authority | 384 |
A health system can appear under more than one legal name, so a group here may be part of a larger one.
Questions about Colorado doctors
13,265 MD and DO clinicians in Colorado are enrolled in Medicare in the CMS file dated Aug 18, 2026, one per NPI, in the state of their main practice location. That is 223 per 100,000 residents, 21st of 51 among the states and DC. Physicians who bill no Medicare patients are not in the file.
Nurse Practitioners are the largest group in Colorado, with 4,675, then physician assistants with 3,789. Nurse practitioners and physician assistants are counted in their own files and are not in the MD and DO total.
We sell national lists, one CSV per specialty for $295, or every specialty in one file for $995. We don't sell a state-only file. City, state and ZIP are on nearly every row, so keeping the Colorado rows is one filter in any spreadsheet.
States with a similar count per capita
Specialty email lists
National CSVs, one per specialty. City, state and ZIP are on the rows, so any state is one filter away.