ICD-10-CM > Z00-Z99 > Z40-Z53 > Z45 > Z45.4 Z45.4 Encounter for adjustment and management of implanted nervous system device Non-Billable/Non-Specific Codes Z45.41Encounter for adjustment and management of cerebrospinal fluid drainage deviceZ45.42Encounter for adjustment and management of neurostimulatorZ45.49Encounter for adjustment and management of other implanted nervous system device