Characterisation of one or more recessive pathogenic or likely pathogenic germline genes, requested by a specialist or consultant physician, for the purpose of determining the reproductive risk of cardiac arrhythmia or channelopathy in a patient: (a) who is a reproductive partner of a person who is a known carrier of a pathogenic or likely pathogenic germline gene variant of a gene confirmed by laboratory findings; and (b) for whom a service to which item 73416 applies has not previously been performed; and (c) for whom carrier status of a pathogenic or likely pathogenic germline gene variant is unknown; and (d) who has a clinical history, family history or laboratory findings suggesting there is a low probability of cardiac arrhythmia or channelopathy Applicable once per gene per lifetime