ICD-10-CM 2027 diagnosis code
T37.5X5Adverse effect of antiviral drugs
T37.5X5 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 T37.5X5
T37.5X5 is the ICD-10-CM diagnosis code for adverse effect of antiviral drugs. 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 T37.5X (poisoning by, adverse effect of and underdosing of antiviral drugs), T37.5X5 is specifically for adverse effect of antiviral drugs. Related codes cover poisoning by antiviral drugs, accidental (unintentional) (T37.5X1), poisoning by antiviral drugs, intentional self-harm (T37.5X2), poisoning by antiviral drugs, assault (T37.5X3), poisoning by antiviral drugs, undetermined (T37.5X4) and underdosing of antiviral drugs (T37.5X6).
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 T37.5X5.
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
- ABOB — Adverse effect
- Aciclovir — Adverse effect
- Acyclovir — Adverse effect
- Adenine › arabinoside — Adverse effect
- Anti-infective NEC › antiviral — Adverse effect
- Antiviral drug NEC — Adverse effect
- Ara-A — Adverse effect
- Azidothymidine — Adverse effect
- AZT — Adverse effect
- Dideoxycytidine — Adverse effect
- Dideoxyinosine — Adverse effect
- Flumidin — Adverse effect
- Foscarnet sodium — Adverse effect
- Fosfonet sodium — Adverse effect
- Ganciclovir (sodium) — Adverse effect
- Ibacitabine — Adverse effect
- Inosine pranobex — Adverse effect
- Interferon (alpha) (beta) (gamma) — Adverse effect
- Methisazone — Adverse effect
- Methisoprinol — Adverse effect
- Metisazone — Adverse effect
- Moroxydine — Adverse effect
- Ribavirin — Adverse effect
- Rimantadine — Adverse effect
- Thymopentin — Adverse effect
- Trifluridine — Adverse effect
- Tromantadine — Adverse effect
- Vidarabine — Adverse effect
- Virugon — Adverse effect
- Zalcitabine — Adverse effect
Codes whose notes reference T37.5X5
- E88.14Use additional code
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 T37.5X5
Is T37.5X5 billable?
- No. T37.5X5 is a header code. Report one of its more specific subcodes instead.