T49.4X6Underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations

T49.4X6 is the ICD-10-CM diagnosis code for 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 3 subcodes must be used instead.

Within T49.4X, choose T49.4X6 (Underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations) only when documentation doesn't support a more specific option: poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, accidental (unintentional) (T49.4X1), poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, intentional self-harm (T49.4X2), poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, assault (T49.4X3), poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, undetermined (T49.4X4) and adverse effect of keratolytics, keratoplastics, and other hair treatment drugs and preparations (T49.4X5).

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.