nash received his a.b., summa cum laude, in engineering and applied science in 1980 from harvard university and his m.d., cum laude, in 1984 from harvard medical school. his internship (1984–1985) and his residency (1985–1987) in medicine were both at the beth israel hospital in boston, massachusetts. from 1987-1989 he was a clinical fellow in medicine (cardiology) at harvard medical school and the beth israel hospital.