Genetic tests in LOINC are typically named based on the genes tested. The disease names should be included as synonyms (related names) so users can find the tests when searching in LOINC. For Liddle Syndrome, these genes are likely SCNN1B and SCNN1G, which we currently do not have codes for in LOINC. We welcome a request for new terms. For information on how to submit a request, please visit https://loinc.org/submissions/.