ICD-10-CM > S00-T88 > T36-T50 > T49 > T49.6 > T49.6X > T49.6X5 T49.6X5 Adverse effect of otorhinolaryngological drugs and preparations Non-Billable/Non-Specific Codes T49.6X5A..., initial encounterT49.6X5D..., subsequent encounterT49.6X5S..., sequela