PINNACLE DERMATOLOGY. 16115 St Vincent Way, Suite 300 Little Rock, AR 72223 *Next to the Promenade. We are the building on the left when entering the campus. PINNACLE DERMATOLOGY CLINTON. 2500 Hwy 65 S . Clinton, AR 72031 PINNACLE DERMATOLOGY RUSSELLVILLE. 220 N Sidney Ave. Russellville, AR 72801.