Cornerstone Medical Associates, LLC / Gerald K. Brantley, MD & Terry Ham, MD Share: Internal Medicine Cornerstone Medical Associates, LLC / Gerald K. Brantley, MD & Terry Ham, MD Visit Website Request Info 1023 Keith Drive Perry, GA 31069 (478) 988-1100 (478) 988-8211 (fax) About Map About Cornerstone Medical Associates is a physician owned and physician controlled, wall-less group practice. The founding physicians of Cornerstone have promulgated a very sophisticated management structur What's Nearby? Distance: 5 10 15 20 25 50 mi.