Dr. John Calhoon, MD

With 20 years of practice, Dr. John Calhoon is an established thoracic surgery provider, MD, after earning their medical degree at Baylor College Of Medicine in 1981. Dr. currently practices across 2 facilities, including in San Antonio, Texas. Their National Provider Identifier (NPI) is 1568579548, and the profile below combines data from CMS NPPES, Medicare billing records, the HHS OIG exclusion list, and — where available — CMS Open Payments, Medicare Utilization, and Part D prescriber summaries.

Dr. John Calhoon's practice is located in ZIP 78229 (San Antonio, Texas), which has an overall CartoChrome Healthcare Access Score of 63/100 (Moderate Access). Access to care in this area is moderate — most services are reachable but with meaningful variability by specialty.

CMS Medicare data shows Dr. John Calhoon as a lower-volume thoracic surgery provider, treating approximately 23 Medicare beneficiaries and delivering 61 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.