Kenny M. Brantley, M.D., Ph.D. 1215 South Coulter Street, Suite 405, Amarillo, Texas 79106 (The 4 story building next to Northwest with the green roof.) (806) 358-8437 Fax (806) 356-0045. Dr. Brantley is a native of Littlefield, Texas, and is a graduate of Texas Tech University where he obtained his BA, PhD, and MD degrees..