T58.2X1A — Toxic effect of carbon monoxide from incomplete combustion of other domestic fuels, accidental (unintentional), initial encounter
Is T58.2X1A billable?
Yes — T58.2X1A is billable for FY2027. T58.2X1A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T58.2X1A may be submitted for encounters from October 1, 2026 through September 30, 2027.
T58.2X1A at a glance
| Code | T58.2X1A |
|---|---|
| Description | Toxic effect of carbon monoxide from incomplete combustion of other domestic fuels, accidental (unintentional), initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in T58.2X1A?
In T58.2X1A, the 7th character A means initial encounter. The 7th character is required for T58.2X1A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T58.2X1A group to?
T58.2X1A sits in MDC 21 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 917Poisoning and Toxic Effects of Drugs with MCCmedical
- 918Poisoning and Toxic Effects of Drugs without MCCmedical
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T58.2X1A 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.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside T58.2X1A to fully describe the condition. T58.2X1A 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 T58.2X1A to fully describe the condition. T58.2X1A is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T58.2X1A, but a patient may have both at the same time. When documentation supports it, T58.2X1A and the excluded code may both be reported.
How long has T58.2X1A existed?
T58.2X1A 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.