ICD-10-CM 2027 diagnosis code
T49.4X5Adverse effect of keratolytics, keratoplastics, and other hair treatment drugs and preparations
T49.4X5 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Adverse effect of keratolyt/keratplst/hair trmt drug
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T49.4X5
T49.4X5 is the ICD-10-CM diagnosis code for adverse effect 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 T49.4X5 (Adverse effect 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 underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations (T49.4X6).
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.
7th character
The appropriate 7th character is to be added to each code from category T49
Notes that apply from higher levels
Instructions written at a parent level also apply to T49.4X5.
› From T49 Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs
- poisoning by, adverse effect of and underdosing of glucocorticoids, topically used
Broader instructions also apply from 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.
Table of Drugs & Neoplasms entries
- Allantoin — Adverse effect
- Alum (medicinal) — Adverse effect
- Ammonium › ichthyosulronate — Adverse effect
- Anthralin — Adverse effect
- Antiseborrheics — Adverse effect
- Bleaching agent (medicinal) — Adverse effect
- Butantrone — Adverse effect
- Cade oil — Adverse effect
- Cadmium (chloride) (fumes) (oxide) › sulfide (medicinal) NEC — Adverse effect
- Capsicum — Adverse effect
- Carbazochrome (salicylate) (sodium sulfonate) — Adverse effect
- Carbon › dioxide (gas) › snow — Adverse effect
- Cellulose › oxidized — Adverse effect
- Chlorothymol — Adverse effect
- Chloroxine — Adverse effect
- Chrysarobin — Adverse effect
- Coal (carbon monoxide from) › tar › medicinal (ointment) — Adverse effect
- Collagenase — Adverse effect
- Corn cures — Adverse effect
- Depilatory — Adverse effect
- Desloughing agent — Adverse effect
- Diachylon plaster — Adverse effect
- Dimethyl › sulfoxide (nonmedicinal) › medicinal — Adverse effect
- Dimethylamine sulfate — Adverse effect
- Dithranol — Adverse effect
- Enzyme NEC › local action — Adverse effect
- Enzyme NEC › proteolytic — Adverse effect
- Ethyl › chloride (anesthetic) › local — Adverse effect
- Ethyl › fumarate — Adverse effect
- Euresol — Adverse effect
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T49.4X5
Is T49.4X5 billable?
- No. T49.4X5 is a header code. Report one of its more specific subcodes instead.