ICD-10-CM 2027 diagnosis code

T41.205Adverse effect of unspecified general anesthetics

Not billable — use a more specific codeRequires 7th character

T41.205 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 T41.205

T41.205 is the ICD-10-CM diagnosis code for adverse effect of unspecified general anesthetics. It belongs to category T41 (poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases), 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 T41.20, choose T41.205 (Adverse effect of unspecified general anesthetics) only when documentation doesn't support a more specific option: poisoning by unspecified general anesthetics, accidental (unintentional) (T41.201), poisoning by unspecified general anesthetics, intentional self-harm (T41.202), poisoning by unspecified general anesthetics, assault (T41.203), poisoning by unspecified general anesthetics, undetermined (T41.204) and underdosing of unspecified general anesthetics (T41.206).

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 T41

Ainitial encounterT41.205A
Dsubsequent encounterT41.205D
SsequelaT41.205S

Notes that apply from higher levels

Instructions written at a parent level also apply to T41.205.

› From T41 Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases

Excludes1

benzodiazepines (T42.4-)
cocaine (T40.5-)
complications of anesthesia during pregnancy (O29.-)
complications of anesthesia during labor and delivery (O74.-)
complications of anesthesia during the puerperium (O89.-)
opioids (T40.0-T40.2-)

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

Anesthesia › potentiated — Adverse effect
Anesthesia › rectal — Adverse effect
Anesthesia › rectal › general — Adverse effect
Anesthetic NEC › with muscle relaxant — Adverse effect
Anesthetic NEC › with muscle relaxant › general — Adverse effect
Anesthetic NEC › general NEC — Adverse effect
Anesthetic NEC › rectal — Adverse effect
Anesthetic NEC › rectal › general — Adverse effect
Central nervous system › depressants › anesthetic (general) NEC — Adverse effect
Depressant › central nervous system (anesthetic) › general anesthetic — Adverse effect
Premedication anesthetic — 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 T41.205

Is T41.205 billable?: No. T41.205 is a header code. Report one of its more specific subcodes instead.