ICD-10-CM > S00-T88 > T36-T50 > T49 > T49.8 > T49.8X > T49.8X4 T49.8X4 Poisoning by other topical agents, undetermined Non-Billable/Non-Specific Codes T49.8X4A..., initial encounterT49.8X4D..., subsequent encounterT49.8X4S..., sequela