T58.9
Header — not billableToxic effect of carbon monoxide from unspecified source
The ICD-10 code for toxic effect of carbon monoxide from unspecified source is T58.9.
T58.9 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 4 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under T58.9
- T58.91Toxic effect of carbon monoxide from unspecified source, accidental (unintentional)
- T58.92Toxic effect of carbon monoxide from unspecified source, intentional self-harm
- T58.93Toxic effect of carbon monoxide from unspecified source, assault
- T58.94Toxic effect of carbon monoxide from unspecified source, undetermined
Related codes in this category
- T58.0Toxic effect of carbon monoxide from motor vehicle exhaustnon-billable header
- T58.1Toxic effect of carbon monoxide from utility gasnon-billable header
- T58.2Toxic effect of carbon monoxide from incomplete combustion of other domestic fuelsnon-billable header
- T58.8Toxic effect of carbon monoxide from other sourcenon-billable header
- T58.9Toxic effect of carbon monoxide from unspecified sourcenon-billable header