Dr. John Derderian, DO

With 20 years of practice, Dr. John Derderian is an established internal medicine provider, DO, after earning their medical degree at Philadelphia College Of Osteopathic Medicine in 2000. Dr. currently practices across 7 facilities, including Reading Hospital in West Reading, Pennsylvania. Their National Provider Identifier (NPI) is 1477595445, 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 Derderian's practice is located in ZIP 17602 (West Reading, Pennsylvania), which has an overall CartoChrome Healthcare Access Score of 65/100 (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 Derderian as a lower-volume internal medicine provider, treating approximately 13 Medicare beneficiaries and delivering 15 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.