Merit Health Medical Group Primary Care Mission 66 1907 Mission 66 Vicksburg, MS 39180 (601) 636-1173 Providers: Walter E. Johnston, M.D. Kim Kilpatrick, FNP Gwen Stewart, NP-C. Merit Health Medical Group Pediatrics River Region Main Campus 2100 Highway 61 North Vicksburg, MS 39183 (601) 883-6001 Providers: Lisa Fairchild, M.D. Izzeddin ....