T58 — Toxic effect of carbon monoxide
Not billable
Is T58 billable?
No — T58 is a non-billable header code. T58 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath T58.
Billable codes under this header
- T58.01XAToxic effect of carbon monoxide from motor vehicle exhaust, accidental (unintentional), initial encounter
- T58.01XDToxic effect of carbon monoxide from motor vehicle exhaust, accidental (unintentional), subsequent encounter
- T58.01XSToxic effect of carbon monoxide from motor vehicle exhaust, accidental (unintentional), sequela
- T58.02XAToxic effect of carbon monoxide from motor vehicle exhaust, intentional self-harm, initial encounter
- T58.02XDToxic effect of carbon monoxide from motor vehicle exhaust, intentional self-harm, subsequent encounter
- T58.02XSToxic effect of carbon monoxide from motor vehicle exhaust, intentional self-harm, sequela
- T58.03XAToxic effect of carbon monoxide from motor vehicle exhaust, assault, initial encounter
- T58.03XDToxic effect of carbon monoxide from motor vehicle exhaust, assault, subsequent encounter
- T58.03XSToxic effect of carbon monoxide from motor vehicle exhaust, assault, sequela
- T58.04XAToxic effect of carbon monoxide from motor vehicle exhaust, undetermined, initial encounter
- T58.04XDToxic effect of carbon monoxide from motor vehicle exhaust, undetermined, subsequent encounter
- T58.04XSToxic effect of carbon monoxide from motor vehicle exhaust, undetermined, sequela
- T58.11XAToxic effect of carbon monoxide from utility gas, accidental (unintentional), initial encounter
- T58.11XDToxic effect of carbon monoxide from utility gas, accidental (unintentional), subsequent encounter
- T58.11XSToxic effect of carbon monoxide from utility gas, accidental (unintentional), sequela
- T58.12XAToxic effect of carbon monoxide from utility gas, intentional self-harm, initial encounter
- T58.12XDToxic effect of carbon monoxide from utility gas, intentional self-harm, subsequent encounter
- T58.12XSToxic effect of carbon monoxide from utility gas, intentional self-harm, sequela
- T58.13XAToxic effect of carbon monoxide from utility gas, assault, initial encounter
- T58.13XDToxic effect of carbon monoxide from utility gas, assault, subsequent encounter
- T58.13XSToxic effect of carbon monoxide from utility gas, assault, sequela
- T58.14XAToxic effect of carbon monoxide from utility gas, undetermined, initial encounter
- T58.14XDToxic effect of carbon monoxide from utility gas, undetermined, subsequent encounter
- T58.14XSToxic effect of carbon monoxide from utility gas, undetermined, sequela
- T58.91XAToxic effect of carbon monoxide from unspecified source, accidental (unintentional), initial encounter
- T58.91XDToxic effect of carbon monoxide from unspecified source, accidental (unintentional), subsequent encounter
- T58.91XSToxic effect of carbon monoxide from unspecified source, accidental (unintentional), sequela
- T58.92XAToxic effect of carbon monoxide from unspecified source, intentional self-harm, initial encounter
- T58.92XDToxic effect of carbon monoxide from unspecified source, intentional self-harm, subsequent encounter
- T58.92XSToxic effect of carbon monoxide from unspecified source, intentional self-harm, sequela
- T58.93XAToxic effect of carbon monoxide from unspecified source, assault, initial encounter
- T58.93XDToxic effect of carbon monoxide from unspecified source, assault, subsequent encounter
- T58.93XSToxic effect of carbon monoxide from unspecified source, assault, sequela
- T58.94XAToxic effect of carbon monoxide from unspecified source, undetermined, initial encounter
- T58.94XDToxic effect of carbon monoxide from unspecified source, undetermined, subsequent encounter
- T58.94XSToxic effect of carbon monoxide from unspecified source, undetermined, sequela
- T58.2X1AToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, accidental (unintentional), initial encounter
- T58.2X1DToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, accidental (unintentional), subsequent encounter
- T58.2X1SToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, accidental (unintentional), sequela
- T58.2X2AToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, intentional self-harm, initial encounter
- T58.2X2DToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, intentional self-harm, subsequent encounter
- T58.2X2SToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, intentional self-harm, sequela
- T58.2X3AToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, assault, initial encounter
- T58.2X3DToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, assault, subsequent encounter
- T58.2X3SToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, assault, sequela
- T58.2X4AToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, undetermined, initial encounter
- T58.2X4DToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, undetermined, subsequent encounter
- T58.2X4SToxic effect of carbon monoxide from incomplete combustion of other domestic fuels, undetermined, sequela
- T58.8X1AToxic effect of carbon monoxide from other source, accidental (unintentional), initial encounter
- T58.8X1DToxic effect of carbon monoxide from other source, accidental (unintentional), subsequent encounter
- T58.8X1SToxic effect of carbon monoxide from other source, accidental (unintentional), sequela
- T58.8X2AToxic effect of carbon monoxide from other source, intentional self-harm, initial encounter
- T58.8X2DToxic effect of carbon monoxide from other source, intentional self-harm, subsequent encounter
- T58.8X2SToxic effect of carbon monoxide from other source, intentional self-harm, sequela
- T58.8X3AToxic effect of carbon monoxide from other source, assault, initial encounter
- T58.8X3DToxic effect of carbon monoxide from other source, assault, subsequent encounter
- T58.8X3SToxic effect of carbon monoxide from other source, assault, sequela
- T58.8X4AToxic effect of carbon monoxide from other source, undetermined, initial encounter
- T58.8X4DToxic effect of carbon monoxide from other source, undetermined, subsequent encounter
- T58.8X4SToxic effect of carbon monoxide from other source, undetermined, sequela
T58 at a glance
| Code | T58 |
|---|---|
| Description | Toxic effect of carbon monoxide |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Includes
Conditions classified to T58.
- asphyxiation from carbon monoxide
- toxic effect of carbon monoxide from all sources
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T58 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- contact with and (suspected) exposure to toxic substances (Z77.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside T58 to fully describe the condition. T58 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T51-T65
Report an additional code alongside T58 to fully describe the condition. T58 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T58, but a patient may have both at the same time. When documentation supports it, T58 and the excluded code may both be reported.
What codes fall under T58? (5)
- T58.0Toxic effect of carbon monoxide from motor vehicle exhaustnot billable
- T58.1Toxic effect of carbon monoxide from utility gasnot billable
- T58.2Toxic effect of carbon monoxide from incomplete combustion of other domestic fuelsnot billable
- T58.8Toxic effect of carbon monoxide from other sourcenot billable
- T58.9Toxic effect of carbon monoxide from unspecified sourcenot billable
How long has T58 existed?
T58 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.