Procedure code 92585, as defined by the American Medical Association, is a medical billing code used for the administration of a comprehensive audiological testing service. In precise terms, it's used for Auditory Evoked Potentials for comprehensive testing (includes pure tone, speech, and dichotic). This procedure entails a series of detailed tests to determine a person's hearing capacities. Your healthcare provider may use this code in billing for services related to diagnosing or treating hearing issues.