Jeffrey E. Petersen, MD is a dermatologist and mohs-micrographic surgeon who practices at St Louis Dermatology, LLC located at 1011 Bowles Avenue in Suite 121 in Fenton, MO 63026 (Saint Louis County). Dr. Jeffrey E. Petersen has 15+ years of experience in dermatology. Education. Jeffrey E. Petersen, MD earned a degree of a Doctor of Medicine..