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, for a suspected genetic neuromuscular disorder; and (ii) after exclusion of non‑genetic causes; and (b) the service is performed using a sample from the fetus; and (c) the service is not performed in conjunction with a service to which item 73426 applies Applicable once per pregnancy