Duplex scanning involving B mode ultrasound imaging and integrated Doppler flow measurements by spectral analysis of arteries or veins, or both, including any associated skin marking, for mapping of bypass conduit before vascular surgery, not being a service associated with any of the following:(a) a service to which an item in Subgroup 3 or 4 applies; (b) a service to which item 55880, 55881, 55882, 55883, 55884, 55885, 55886, 55887, 55888, 55889, 55890, 55891, 55892, 55893, 55894 or 55895 applies (R)