Type of Modifier Modifiers Listed Additional Healthcare Common Procedure Coding System (HCPCS) Modifiers AE, AF, AG, AI, AK, AM, AO, AT, AZ, BL, CA, CB, CG, CR, CT, DA, ER, ET, FB, FC, FX, FY, G7, GC, GE, GG, GJ, GU, J1, J2, J3, JC, JC, JD, JG, JW, KX, L1, M2, PD, PI, PO, PN, PS, PT, Q0, Q1, Q3, Q4, Q5, Q6, QQ, RD, RE, SC, SF, SS, SW, TB, TC, TS, UJ, UN, UP, UQ, UR, US, X1, X2, X3, X4, X5, XE, XP, XS, XU, ZA, ZB, ZC Advance Beneficiary Notice of Noncoverage (ABN) Modifiers GA, GX, GY, GZ Ambulance Modifiers D, E, G, H, I, J, N, P, R, S, X, GM, QL, QM, QN Anatomical Modifiers (Coronary Artery, Eye Lid, Finger, Side of Body, Toe) E1, E2, E3, E4, FA,F1,F2,F4, F5, F6, F7, F8, F9, LC, LD, LM, LT, RC, RI, RT, TA, T1, T2, T3, T4, T5, T6, T7, T8, T9 Note: These modifiers should be used in place of modifier 59 whenever possible. Anesthesia Modifiers AA, AD, G8, G9, P1, P2, P3, P4, P5,P6, ...