Patient Portal. Patient Portal. Online Payment. 3001 Newcastle Loop. Myrtle Beach, SC 29588 (843) 215-1100. 933 Medical Circle. Myrtle Beach, SC 29572 (843) 215-1100. 843-215-1211. Welcome to Grand Strand Dermatology! At Grand Strand Dermatology, our goal is to provide comprehensive medical, surgical and cosmetic dermatologic care to the Grand ....