Call Now: (817) 329-1350 Call Now: (817) 329-1350. THE FULL SPECTRUM OF SKIN CARE. Welcome to Prism Dermatology, the new premier provider of the latest medical and cosmetic skin care. Simply put, we're raising the bar in skin care for our neighbors in Southlake, Keller, Trophy Club, Flower Mound, Grapevine, Irving-Las Colinas, and Colleyville..