T59.891Header code — not billable

Toxic effect of other specified gases, fumes and vapors, accidental (unintentional)

Short description: Toxic effect of gases, fumes and vapors, accidental

Chapter
19. Injury, poisoning and certain other consequences of external causes
Category
T59
Effective date
October 1, 2026

Related codes in category T59

T59Toxic effect of other gases, fumes and vaporsT59.0Toxic effect of nitrogen oxidesT59.0XToxic effect of nitrogen oxidesT59.0X1Toxic effect of nitrogen oxides, accidental (unintentional)T59.0X1AToxic effect of nitrogen oxides, accidental, initYesT59.0X1DToxic effect of nitrogen oxides, accidental, subsYesT59.0X1SToxic effect of nitrogen oxides, accidental, sequelaYesT59.0X2Toxic effect of nitrogen oxides, intentional self-harmT59.0X2AToxic effect of nitrogen oxides, intentional self-harm, initYesT59.0X2DToxic effect of nitrogen oxides, intentional self-harm, subsYesT59.0X2SToxic effect of nitrogen oxides, self-harm, sequelaYesT59.0X3Toxic effect of nitrogen oxides, assault

Frequently asked questions

What is ICD-10 code T59.891?

T59.891 is an ICD-10-CM diagnosis code for Toxic effect of other specified gases, fumes and vapors, accidental (unintentional).

Is T59.891 a billable code?

No. T59.891 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is T59.891 in?

T59.891 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.

When did T59.891 become effective?

T59.891 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to T59.891?

T59.891 belongs to category T59, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.