T59.891 — Toxic effect of other specified gases, fumes and vapors, accidental (unintentional)
Is T59.891 billable?
No — T59.891 is a non-billable header code. T59.891 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath T59.891.
Billable codes under this header
- T59.891AToxic effect of other specified gases, fumes and vapors, accidental (unintentional), initial encounter
- T59.891DToxic effect of other specified gases, fumes and vapors, accidental (unintentional), subsequent encounter
- T59.891SToxic effect of other specified gases, fumes and vapors, accidental (unintentional), sequela
T59.891 at a glance
| Code | T59.891 |
|---|---|
| Description | Toxic effect of other specified gases, fumes and vapors, accidental (unintentional) |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is T59.891 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T59.89, the nearest indexed parent of T59.891. Use them to find the family, then select the specific code.
- Inhalation › gases, fumes, or vapors › specified agent NEC
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T59.891 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- contact with and (suspected) exposure to toxic substances (Z77.-)
Excludes1 — never code together — inherited from T59
The conditions below can never be reported together with T59.891 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- chlorofluorocarbons (T53.5)
Use additional code — inherited from Chapter 19
Report an additional code alongside T59.891 to fully describe the condition. T59.891 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T51-T65
Report an additional code alongside T59.891 to fully describe the condition. T59.891 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T59.891, but a patient may have both at the same time. When documentation supports it, T59.891 and the excluded code may both be reported.
What codes fall under T59.891? (3)
- T59.891AToxic effect of other specified gases, fumes and vapors, accidental (unintentional), initial encounter
- T59.891DToxic effect of other specified gases, fumes and vapors, accidental (unintentional), subsequent encounter
- T59.891SToxic effect of other specified gases, fumes and vapors, accidental (unintentional), sequela
How long has T59.891 existed?
T59.891 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.