Which New York City subway stops at Avenue D?

No subway stops at Avenue D. Or Avenues C, B and A. All of Alphabet City is without subway stations. You either take the L (the grey line) to 1st Avenue and walk southeast, or take the J (of the J-Z, the brown line) or the F(of the B-D-F-M, the orange line) to Delancey Street-Essex Street and walk northeast.