Prenatal detection of unknown gene variants (including maternal cell contamination assessment) using a gene panel, if: (a) the service is requested: (i) by a specialist or consultant physician; and (ii) for a suspected genetic neuromuscular disorder; and (iii) after exclusion of non‑genetic causes; and (b) the request states that singleton testing is inappropriate; and (c) the service is performed using a sample from the fetus and a sample from each of the fetus’s biological parents; and (d) the service is not performed in conjunction with a service to which item 73425 applies Applicable once per pregnancy