Characterisation of one or more pathogenic or likely pathogenic germline gene variants, requested by a specialist or consultant physician, if: (a) a service described in item 73392 has not previously been performed for the patient; and (b) the patient is a first-degree biological relative (or a second-degree biological relative if a first-degree biological relative is unavailable) of a person who has a pathogenic or likely pathogenic germline gene variant that is confirmed by laboratory findings; and (c) the service is performed for the purpose of assessing present or future risk of any of the following heritable cardiomyopathies in the patient: (i) hypertrophic cardiomyopathy; (ii) dilated cardiomyopathy; (iii) arrhythmogenic cardiomyopathy Applicable once per variant per lifetime