Gregory Simpson, MD, is a physician in Fresno, California, with evidence of work in dermatology, including co-authorship of a case report on pruritic scaly plaques. He has delivered lectures in San Francisco, Washington, D.C., Georgia, Yosemite, and throughout the greater Central Valley, and has worked with residents in internal medicine, pediatrics, and emergency medicine as well as with medical students. Source notes also associate his work with Inspire Health Medical Group and the UCSF School of Medicine regional campus in Fresno.