T58
ICD-10Non-billable categoryToxic effect of carbon monoxide
Official ICD-10-CM descriptor (FY2026)
Toxic effect of carbon monoxide
T58 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Includes
- asphyxiation from carbon monoxide
- toxic effect of carbon monoxide from all sources
7th character
- The appropriate 7th character is to be added to each code from category T58
Permitted 7th characters
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
More specific codes under T58
- T58.0Toxic effect of carbon monoxide from motor vehicle exhaustcategory
- T58.1Toxic effect of carbon monoxide from utility gascategory
- T58.2Toxic effect of carbon monoxide from incmpl combst dmst fuelcategory
- T58.8Toxic effect of carbon monoxide from other sourcecategory
- T58.9Toxic effect of carbon monoxide from unspecified sourcecategory
Where this code sits
Krasyn AI Coder
Get code suggestions automatically as you type notes. Free for 50 analyses.
Install for Chrome — freeSource
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.