William Louis Jaffee MD became an Endocrinology, Diabetes, & Metabolism doctor in 1973. Male doctor. Specialty Dr. Jaffee specializes in the following: Endocrinology, Diabetes, & Metabolism Location New Castle Hockessin DEĀ  19707 phone: 302-998-2166 fax: 302-998-1525 email: website: Education Dr. Jaffee was educated at the following institutions: Medical School Attended: Oh State Univ Coll Of