He attended Heidelberg University for medical school and subsequently trained at Massachusetts General Hospital for residency. Dr. Weissleder's areas of expertise include the following: cancer, diagnostic imaging, and clinical trials. Blue Cross/Blue Shield, Coventry, and Humana ChoiceCare Network are among the insurance carriers that Dr. Weissleder takes. In addition to English, Dr. Weissleder (or staff) speaks Spanish and German. He is affiliated with Massachusetts General Hospital.