The CPT (Current Procedural Terminology) code for a diagnostic sleep-deprived auditory brainstem response test can vary based on specifics, but the general code for an auditory brainstem response test is typically either 92585 or 92586. Since these tests are often administered under unique circumstances, such as sleep deprivation, your healthcare provider may use an additional or different code. Therefore, it’s always a good idea to check with your healthcare provider or insurance company for the most accurate code.