T58 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Toxic effect of carbon monoxide.
Includes
Asphyxiation from carbon monoxide
Toxic effect of carbon monoxide from all sources
Seventh character note
The appropriate 7th character is to be added to each code from category T58
Seventh character extensions
A: initial encounter
D: subsequent encounter
S: sequela
Codes
T58.0
Toxic effect of carbon monoxide from motor vehicle exhaust
T58.1
Toxic effect of carbon monoxide from utility gas
T58.2
Toxic effect of carbon monoxide from incomplete combustion of other domestic fuels
T58.8
Toxic effect of carbon monoxide from other source
T58.9
Toxic effect of carbon monoxide from unspecified source
Versions
2026
No changes
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code