Is ICD-10-CM code T59 billable?

No, T59 (Toxic effect of other gases, fumes and vapors) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code T59 belong to?

T59 belongs to Chapter 19 of the ICD-10-CM tabular list: S00–T88 (Injury, Poisoning and Certain Other Consequences of External Causes).

T59Non-billable

Toxic effect of other gases, fumes and vapors

Injury, Poisoning and Certain Other Consequences of External Causes·Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)·category·FY 2026

Use a more specific code (0 billable, 10 non-billable)

T59.0Toxic effect of nitrogen oxideshas subcodes T59.1Toxic effect of sulfur dioxidehas subcodes T59.2Toxic effect of formaldehydehas subcodes T59.3Toxic effect of lacrimogenic gashas subcodes T59.4Toxic effect of chlorine gashas subcodes T59.5Toxic effect of fluorine gas and hydrogen fluoridehas subcodes T59.6Toxic effect of hydrogen sulfidehas subcodes T59.7Toxic effect of carbon dioxidehas subcodes T59.8Toxic effect of other specified gases, fumes and vaporshas subcodes T59.9Toxic effect of unspecified gases, fumes and vaporshas subcodes

CH19 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

birth trauma (P10-P15)
obstetric trauma (O70-O71)

Use Additional Code

code to identify any retained foreign body, if applicable (Z18.-)

T51-T65 Parent Instructions

Excludes1(Not coded here. Use a different code.)

contact with and (suspected) exposure to toxic substances (Z77.-)

Use Additional Code

code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)
to identify any retained foreign body, if applicable (Z18.-)

Instructional Notes

Includes

aerosol propellants

Excludes1(Not coded here. Use a different code.)

chlorofluorocarbons (T53.5)

Clinical Hierarchy

BillableHas subcodes

CH19Injury, poisoning and certain other consequences of external causes (S00-T88)

T51-T65Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

T59Toxic effect of other gases, fumes and vaporsNot billable

T59.0Toxic effect of nitrogen oxidesSubcodes

T59.1Toxic effect of sulfur dioxideSubcodes

T59.2Toxic effect of formaldehydeSubcodes

T59.3Toxic effect of lacrimogenic gasSubcodes

T59.4Toxic effect of chlorine gasSubcodes

T59.5Toxic effect of fluorine gas and hydrogen fluorideSubcodes

T59.6Toxic effect of hydrogen sulfideSubcodes

T59.7Toxic effect of carbon dioxideSubcodes

T59.8Toxic effect of other specified gases, fumes and vaporsSubcodes

T59.9Toxic effect of unspecified gases, fumes and vaporsSubcodes

MS-DRG Classification

2026

No direct MS-DRG triggers identified.