ICD-10-CM 2027 diagnosis code

T37.95Adverse effect of unspecified systemic anti-infective and antiparasitic

Not billable — use a more specific codeRequires 7th character

T37.95 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 unsp sys anti-infect and antiparasitic

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 T37.95

T37.95 is the ICD-10-CM diagnosis code for adverse effect of unspecified systemic anti-infective and antiparasitic. 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 T37.9, choose T37.95 (Adverse effect of unspecified systemic anti-infective and antiparasitic) only when documentation doesn't support a more specific option: poisoning by unspecified systemic anti-infective and antiparasitics, accidental (unintentional) (T37.91), poisoning by unspecified systemic anti-infective and antiparasitics, intentional self-harm (T37.92), poisoning by unspecified systemic anti-infective and antiparasitics, assault (T37.93), poisoning by unspecified systemic anti-infective and antiparasitics, undetermined (T37.94) and underdosing of unspecified systemic anti-infectives and antiparasitics (T37.96).

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

Ainitial encounterT37.95XA
Dsubsequent encounterT37.95XD
SsequelaT37.95XS

Notes that apply from higher levels

Instructions written at a parent level also apply to T37.95.

› From T37 Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics

Excludes1

anti-infectives topically used for ear, nose and throat (T49.6-)
anti-infectives topically used for eye (T49.5-)
locally applied anti-infectives NEC (T49.0-)

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

Acriflavine — Adverse effect
Ammonium › mandelate — Adverse effect
Antifungal › anti-infective NEC — Adverse effect
Anti-infective NEC — Adverse effect
Anti-infective NEC › mixed — Adverse effect
Antiparasitic drug (systemic) — Adverse effect
Calcium › mandelate — Adverse effect
Ethoxazene — Adverse effect
Furadantin — Adverse effect
Furoxone — Adverse effect
Nifuraldezone — Adverse effect
Serenium (hydrochloride) — 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 T37.95

Is T37.95 billable?: No. T37.95 is a header code. Report one of its more specific subcodes instead.