New Search 323 John C. Horner, III MD (423) 587-5283 Primary Specialties Internal Medicine Languages Spoken: English Primary Office Address: John C. Horner, III, MD 538 W 6th North Street Morristown, TN 37814-3939 Phone: (423) 587-5283 Fax: (423) 587-9508 Recommend this Physician Get Directions Education Medical School: University of Tennessee, College of Medicine Residency: East Tennessee State University Certifications AB Internal Medicine - Internal Medicine