The federal NPI Registry lists 137 individual clinicians in Colorado with allergy and immunology as their primary specialty, plus 55 organizations. That ranks Colorado 15th among the 50 states and DC by listed clinicians.
Cities with the most listed clinicians
| City | Clinicians listed |
|---|---|
| Denver | 31 |
| Aurora | 23 |
| Lakewood | 17 |
| Fort Collins | 11 |
| Colorado Springs | 10 |
| Centennial | 6 |
| Lone Tree | 5 |
| Highlands Ranch | 4 |
| Boulder | 3 |
| Fort Carson | 3 |
Specialty mix
| Primary taxonomy | Clinicians |
|---|---|
| Allergy & Immunology | 100 |
| Internal Medicine, Allergy & Immunology | 13 |
| Pediatrics, Pediatric Allergy/Immunology | 12 |
| Allergy & Immunology, Allergy | 12 |
This pull searched the registry's Allergy & Immunology taxonomy. Pediatric subspecialists are registered under separate pediatric taxonomies, so the pediatric rows here undercount them.
Organizations listed on Immunologists.com
4 of the 55 allergy and immunology organizations in the Colorado registry count have a profile on Immunologists.com so far. The rest don't have a listing here yet, and a profile is not an endorsement.
- Asthma & Allergy Associates, PC
- Allergy & Asthma Consultants Of The Rockies PC
- Village Medical Center PC
- Michael A Volz MD PC
For practice owners
Planning a sale, a partner buy-in or a new hire in Colorado? Run the numbers with the practice calculators, or text Richard at (808) 600-9260 about growth capital.
Sources
- NPPES NPI Registry (Centers for Medicare and Medicaid Services), primary taxonomy counts by practice location state
- Counts come from a November 2026 pull of the NPPES NPI Registry API, filtered to records whose primary taxonomy is allergy and immunology and grouped by practice location address. Individual clinicians are NPI-1 records and organizations are NPI-2 records.
Immunologists.com is a business directory and education site. It does not give medical advice, rank or rate care, or refer patients. Listings come from public registry data and are not endorsements.
