Duplex scanning, unilateral, involving B mode ultrasound imaging and integrated Doppler flow measurements by spectral analysis of veins in the lower limb, below the inguinal ligament, for chronic venous disease, not being a service associated with any of the following:(a) a service to which item 55244 applies;(b) a service to which an item in Subgroup 4 applies;(c) a service to which item 55880, 55881, 55882, 55883, 55884, 55885, 55886, 55887, 55888, 55889, 55890, 55891, 55892, 55893, 55894 or 55895 applies (R)