ICD-10-CM 2027 diagnosis code
T58.8X3Toxic effect of carbon monoxide from other source, assault
T58.8X3 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T58.8X3
T58.8X3 is the ICD-10-CM diagnosis code for toxic effect of carbon monoxide from other source, assault. It belongs to category T58 (toxic effect of carbon monoxide), block T51-T65 (toxic effects of substances chiefly nonmedicinal as to source) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
Within T58.8X (toxic effect of carbon monoxide from other source), T58.8X3 is specifically for toxic effect of carbon monoxide from other source, assault. Related codes cover accidental (unintentional) (T58.8X1), intentional self-harm (T58.8X2) and undetermined (T58.8X4).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category T58
Notes that apply from higher levels
Instructions written at a parent level also apply to T58.8X3.
› From T58 Toxic effect of carbon monoxide
- asphyxiation from carbon monoxide
- toxic effect of carbon monoxide from all sources
Broader instructions also apply from T51-T65 Toxic effects of substances chiefly nonmedicinal as to source and Chapter 19: Injury, poisoning and certain other consequences of external causes.
Table of Drugs & Neoplasms entries
- Blast furnace gas (carbon monoxide from) — Poisoning Assault
- Carbon › monoxide (from incomplete combustion) › blast furnace gas — Poisoning Assault
- Carbon › monoxide (from incomplete combustion) › industrial fuels or gases, any — Poisoning Assault
- Carbon › monoxide (from incomplete combustion) › kiln gas or vapor — Poisoning Assault
- Carbon › monoxide (from incomplete combustion) › producer gas — Poisoning Assault
- Carbon › monoxide (from incomplete combustion) › specified source NEC — Poisoning Assault
- Charcoal › fumes (Carbon monoxide) › industrial — Poisoning Assault
- Coke fumes or gas (carbon monoxide) › industrial use — Poisoning Assault
- Fuel › industrial, incomplete combustion — Poisoning Assault
- Furnace (coal burning) (domestic), gas from › industrial — Poisoning Assault
- Gas NEC › blast furnace — Poisoning Assault
- Gas NEC › fuel (domestic use) (after combustion) › industrial use — Poisoning Assault
- Gas NEC › kiln — Poisoning Assault
- Gas NEC › producer — Poisoning Assault
- Kiln gas or vapor (carbon monoxide) — Poisoning Assault
- Producer gas — Poisoning Assault
- Vapor › kiln (carbon monoxide) — Poisoning Assault
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T58.8X3
Is T58.8X3 billable?
- No. T58.8X3 is a header code. Report one of its more specific subcodes instead.