I am having trouble finding the correct codes for the following procedure. I am not finding an IMA duplex study code. "VASCULAR DUPLEX REPORT INDICATIONS: Pre-op CABG. EXAM DESCRIPTION: Bilateral internal mammary artery duplex. FINDINGS: Right IMA Prox 78cm/sec mm in diameter Mid in diameter Dist 56 cm/sec in diameter Left IMA Prox 73cm/sec in diameter Mid 61 cm/sec in diameter Dist 63cm/sec in diameter. CONCLUSIONS Patient s right IMA appears to be WNL per arterial color duplex and doppler flow imaging. Patient's left IMA appears to be WNL per arterial color duplex and doppler flow imaging."