T59.4

T59.4: Toxic effect of chlorine gas

Non-billable headerICD-10-CM

T59.4 is a non-billable header ICD-10-CM code for toxic effect of chlorine gas. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category T59

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above T59.4

A category’s note binds every code beneath it.

Written on T59: Toxic effect of other gases, fumes and vapors

chlorofluorocarbons (T53.5)

Other codes that can never be billed with T59.4

Their own Excludes1 notes name this code, so the conflict is not listed above.

T71Asphyxiation

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead T59.4

1 child code. Green means billable.

T59.4XToxic effect of chlorine gas