Dr. Mark Casillas Jr, MD – Knoxville, TN
Sarah Marsh
Updated on July 02, 2026
Dr. Casillas is on Doximity
As a Doximity member you'll join over two million verified healthcare professionals in a private, secure network.
- Connect with other colleagues in the same hospital or clinic
- Search all U.S. specialist profiles and refer a patient
- Read the latest clinical news and earn CME/CEU credits
