ICD-10-CM 2027 diagnosis code

T59Toxic effect of other gases, fumes and vapors

Not billable — use a more specific code

T59 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

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 T59

T59 is the ICD-10-CM diagnosis code for toxic effect of other gases, fumes and vapors. It belongs to 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 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: T59.0 (oxides), T59.1 (dioxide), T59.2 (formaldehyde), T59.3 (gas), T59.4 (gas), T59.5 (fluoride), T59.6 (sulfide), T59.7 (dioxide) and 2 more.

Don't report T59 together with the conditions in its Excludes1 note: chlorofluorocarbons (T53.5).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under T59

Coding notes

IncludesFurther defines the content of the category

aerosol propellants

Excludes1Not coded here — never report together with this code

chlorofluorocarbons (T53.5)

Notes that apply from higher levels

Instructions written at a parent level also apply to T59.

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.

Codes whose notes reference T59

T71Excludes1

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 T59

Is T59 billable?: No. T59 is a header code. Report one of its more specific subcodes instead.