Welcome to Dermatology Associates P.A.   Our physician staff has a total of more than 40 years clinical and hospital experience. They are Board Certified by the American Board of Dermatology and are Fellows of the American Academy of Dermatology. John Sowell, M.D. joined Dermatology Associates in 1994, followed by Lon Raby, Jr., M.D. in 1996, and Patricia Wilson, M.D. in 1998. We promote healthy skin and provide clinical and cosmetic dermatology services to Northern Alabama and the Tennessee Valley area.