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ICD-10-CM · FY 2026 APRIL UPDATE

T58.8

Toxic effect of carbon monoxide from other source

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T58.8XToxic effect of carbon monoxide from other sourceCategory
T58.8X1Toxic effect of carbon monoxide from other source, accidental (unintentional)Category
T58.8X1AToxic effect of carbon monoxide from other source, accidental (unintentional), initial encounterBillable
T58.8X1DToxic effect of carbon monoxide from other source, accidental (unintentional), subsequent encounterBillable
T58.8X1SToxic effect of carbon monoxide from other source, accidental (unintentional), sequelaBillable
T58.8X2Toxic effect of carbon monoxide from other source, intentional self-harmCategory
T58.8X2AToxic effect of carbon monoxide from other source, intentional self-harm, initial encounterBillable
T58.8X2DToxic effect of carbon monoxide from other source, intentional self-harm, subsequent encounterBillable
T58.8X2SToxic effect of carbon monoxide from other source, intentional self-harm, sequelaBillable
T58.8X3Toxic effect of carbon monoxide from other source, assaultCategory
T58.8X3AToxic effect of carbon monoxide from other source, assault, initial encounterBillable
T58.8X3DToxic effect of carbon monoxide from other source, assault, subsequent encounterBillable
T58.8X3SToxic effect of carbon monoxide from other source, assault, sequelaBillable
T58.8X4Toxic effect of carbon monoxide from other source, undeterminedCategory
T58.8X4AToxic effect of carbon monoxide from other source, undetermined, initial encounterBillable
T58.8X4DToxic effect of carbon monoxide from other source, undetermined, subsequent encounterBillable
T58.8X4SToxic effect of carbon monoxide from other source, undetermined, sequelaBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.