ICD-10-CM 2027 diagnosis code
T37.4X5Adverse effect of anthelminthics
T37.4X5 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.
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 T37.4X5
T37.4X5 is the ICD-10-CM diagnosis code for adverse effect of anthelminthics. It belongs to category T37 (poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics), 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 T37.4X (poisoning by, adverse effect of and underdosing of anthelminthics), T37.4X5 is specifically for adverse effect of anthelminthics. Related codes cover poisoning by anthelminthics, accidental (unintentional) (T37.4X1), poisoning by anthelminthics, intentional self-harm (T37.4X2), poisoning by anthelminthics, assault (T37.4X3), poisoning by anthelminthics, undetermined (T37.4X4) and underdosing of anthelminthics (T37.4X6).
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 T37
Notes that apply from higher levels
Instructions written at a parent level also apply to T37.4X5.
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
- Alantolactone — Adverse effect
- Albendazole — Adverse effect
- Amphotalide — Adverse effect
- Anthelmintic NEC — Adverse effect
- Anthiolimine — Adverse effect
- Antifilarial drug — Adverse effect
- Antihelmintics — Adverse effect
- Antihookworm drug — Adverse effect
- Anti-infective NEC › anthelmintic — Adverse effect
- Antinematode drug — Adverse effect
- Antiplatyhelmintic drug — Adverse effect
- Antischistosomal drug — Adverse effect
- Antitapeworm drug — Adverse effect
- Antiwhipworm drug — Adverse effect
- Ascaridole — Adverse effect
- Aspidium (oleoresin) — Adverse effect
- Bephenium hydroxy-naphthoate — Adverse effect
- Bithionol › anthelmintic — Adverse effect
- Bitoscanate — Adverse effect
- Chenopodium — Adverse effect
- Dichlorophen — Adverse effect
- Diethyl › carbamazine — Adverse effect
- Diethylcarbamazine — Adverse effect
- Dithiazanine iodide — Adverse effect
- Fenbendazole — Adverse effect
- Filix mas — Adverse effect
- Flubendazole — Adverse effect
- Helenin — Adverse effect
- Ivermectin — Adverse effect
- Levamisole — 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 T37.4X5
Is T37.4X5 billable?
- No. T37.4X5 is a header code. Report one of its more specific subcodes instead.