, including CYP2C19, CYP2D6, and CYP2D6 duplication/deletion analysis 0029U Drug metabolism (adverse drug reactions and drug response), targeted sequence analysis (ie, CYP1A2, CYP2C19, CYP2C9, CYP2D6, CYP3A4, CYP3A5, CYP4F2, SLCO1B1, VKORC1 and rs12777823) 0030U Drug metabolism (warfarin drug response), targeted sequence analysis (ie, CYP2C9, CYP4F2, VKORC1, rs12777823) 0031U CYP1A2 (cytochrome P450 family , CYP2C19, CYP2C, CYP2D6, CYP3A5, CYP4F2, DPYD, G6PD, GGCX, NUDT15, SLCO1B1, TPMT, UGT1A1, VKORC1), reported as metabolizer status and transporter function G9143 Warfarin responsiveness testing by genetic technique using any method, any number of specimen(s) ICD-10 Diagnosis Refer to the ICD-10 CM manual HistoryStatus Review Date Effective Date Action Updated codes 04/01/2025 n/a Unchanged CPT code update