T59.814A — Toxic effect of smoke, undetermined, initial encounter
Is T59.814A billable?
Yes — T59.814A is billable for FY2027. T59.814A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T59.814A may be submitted for encounters from October 1, 2026 through September 30, 2027.
T59.814A at a glance
| Code | T59.814A |
|---|---|
| Description | Toxic effect of smoke, undetermined, 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 T59.814A?
In T59.814A, the 7th character A means initial encounter. The 7th character is required for T59.814A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T59.814A group to?
T59.814A 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
How is T59.814A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T59.81, the nearest indexed parent of T59.814A. Use them to find the family, then select the specific code.
- Inhalation › smoke
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T59.814A 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 T59.814A 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 T59.814A to fully describe the condition. T59.814A 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 T59.814A to fully describe the condition. T59.814A is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T59.814A, but a patient may have both at the same time. When documentation supports it, T59.814A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T59.81
The conditions below are not part of T59.814A, but a patient may have both at the same time. When documentation supports it, T59.814A and the excluded code may both be reported.
- toxic effect of cigarette (tobacco) smoke (T65.22-)
How long has T59.814A existed?
T59.814A 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.