CMS Doctors and Clinicians National Downloadable File
Retrieved June 27, 2026- Data
- Clinician practice ZIP codes, specialties, and unique NPI identifiers.
- What it tells us
- Estimates county specialist supply after deduplication.
Rating
Regional Specialist Physician Supply
Scale55-100
Higher values are better.
About This Ranking
Highlight places with stronger county-level access to non-primary-care medical and surgical specialists, using deduplicated CMS clinicians and a population-smoothed rate.
Sources
3 sourcesData behind the rating
Census ZCTA-to-county relationship file
2020 Census- Data
- ZIP-area and county overlap from the 2020 Census.
- What it tells us
- Maps clinician practice ZIP codes into county-level counts.
County Health Rankings & Roadmaps
March 25, 2026 release- Data
- County provider counts and rates for primary, mental-health, and dental care.
- What it tells us
- Shows the local supply of everyday care providers.
Top 10 Locations
Ranked by Regional Specialist Physician Supply.
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