New Search 3525 Mark A. Casillas, Jr. MD (865) 305-5335 Languages Spoken: English Primary Office Address: University Colon and Rectal Surgery 1934 Alcoa Highway Suite 370 Knoxville, TN 379201524 Phone: (865) 305-5335 Fax: (865) 305-8840 Recommend this Physician Get Directions Certifications AB Surgery - Surgery Areas of Interest Surgery, Colon & Rectal