ICD-10-CM > S00-T88 > T36-T50 > T36 > T36.5 > T36.5X > T36.5X6 T36.5X6 Underdosing of aminoglycosides Non-Billable/Non-Specific Codes T36.5X6A..., initial encounterT36.5X6D..., subsequent encounterT36.5X6S..., sequela