T59.91XABillable
Toxic effect of unspecified gases, fumes and vapors, accidental (unintentional), initial encounter
Short description: Toxic effect of unsp gases, fumes and vapors, acc, init
- 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 T59.91XA?
T59.91XA is an ICD-10-CM diagnosis code for Toxic effect of unspecified gases, fumes and vapors, accidental (unintentional), initial encounter.
Is T59.91XA a billable code?
Yes. T59.91XA is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is T59.91XA in?
T59.91XA falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did T59.91XA become effective?
T59.91XA has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to T59.91XA?
T59.91XA 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.