T34.42XA — Frostbite with tissue necrosis of left arm, initial encounter
Is T34.42XA billable?
Yes — T34.42XA is billable for FY2027. T34.42XA is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T34.42XA may be submitted for encounters from October 1, 2026 through September 30, 2027.
T34.42XA at a glance
| Code | T34.42XA |
|---|---|
| Description | Frostbite with tissue necrosis of left arm, 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 T34.42XA?
In T34.42XA, the 7th character A means initial encounter. The 7th character is required for T34.42XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T34.42XA group to?
T34.42XA 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.
- 922Other Injury, Poisoning and Toxic Effect Diagnoses with MCCmedical
- 923Other Injury, Poisoning and Toxic Effect Diagnoses without MCCmedical
As a secondary diagnosis, T34.42XA is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG. It also carries Hospital-Acquired Condition category 05.
How is T34.42XA listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T34.4, the nearest indexed parent of T34.42XA. Use them to find the family, then select the specific code.
- Frostbite › arm › with tissue necrosis (superficial)
Use additional code — inherited from Chapter 19
Report an additional code alongside T34.42XA to fully describe the condition. T34.42XA is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T34.42XA, but a patient may have both at the same time. When documentation supports it, T34.42XA and the excluded code may both be reported.
Excludes2 — not included here — inherited from T33-T34
The conditions below are not part of T34.42XA, but a patient may have both at the same time. When documentation supports it, T34.42XA and the excluded code may both be reported.
Excludes2 — not included here — inherited from T34.4
The conditions below are not part of T34.42XA, but a patient may have both at the same time. When documentation supports it, T34.42XA and the excluded code may both be reported.
- frostbite with tissue necrosis of wrist and hand (T34.5-)
How long has T34.42XA existed?
T34.42XA 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.