T49.4Poisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations

T49.4 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations. It belongs to category T49 (poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 1 subcodes must be used instead.

Within T49, choose T49.4 (keratolytics, keratoplastics, and other hair treatment drugs and preparations) only when documentation doesn't support a more specific option: local antifungal, anti-infective and anti-inflammatory drugs (T49.0), antipruritics (T49.1), local astringents and local detergents (T49.2), emollients, demulcents and protectants (T49.3), ophthalmological drugs and preparations (T49.5), otorhinolaryngological drugs and preparations (T49.6), dental drugs, topically applied (T49.7), other topical agents (T49.8) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.