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.
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Asphyxiation from carbon monoxide
Toxic effect of carbon monoxide from all sources
The appropriate 7th character is to be added to each code from category T58
A: initial encounter
D: subsequent encounter
S: sequela
Toxic effect of carbon monoxide from motor vehicle exhaust
Toxic effect of carbon monoxide from utility gas
Toxic effect of carbon monoxide from incomplete combustion of other domestic fuels
Toxic effect of carbon monoxide from other source
Toxic effect of carbon monoxide from unspecified source
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