T34.40XS — Frostbite with tissue necrosis of unspecified arm, sequela
Is T34.40XS billable?
Yes, but T34.40XS is an unspecified code. T34.40XS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T34.40XS is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting T34.40XS — the more specific alternatives are listed below.
T34.40XS at a glance
| Code | T34.40XS |
|---|---|
| Description | Frostbite with tissue necrosis of unspecified arm, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in T34.40XS?
In T34.40XS, the 7th character S means sequela. The 7th character is required for T34.40XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T34.40XS group to?
T34.40XS 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
How is T34.40XS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T34.4, the nearest indexed parent of T34.40XS. 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 T34.40XS to fully describe the condition. T34.40XS 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 T34.40XS, but a patient may have both at the same time. When documentation supports it, T34.40XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from T33-T34
The conditions below are not part of T34.40XS, but a patient may have both at the same time. When documentation supports it, T34.40XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from T34.4
The conditions below are not part of T34.40XS, but a patient may have both at the same time. When documentation supports it, T34.40XS and the excluded code may both be reported.
- frostbite with tissue necrosis of wrist and hand (T34.5-)
How long has T34.40XS existed?
T34.40XS 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.