T34.521A — Frostbite with tissue necrosis of right hand, initial encounter
Is T34.521A billable?
Yes — T34.521A is billable for FY2027. T34.521A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T34.521A may be submitted for encounters from October 1, 2026 through September 30, 2027.
T34.521A at a glance
| Code | T34.521A |
|---|---|
| Description | Frostbite with tissue necrosis of right hand, 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 T34.521A?
In T34.521A, the 7th character A means initial encounter. The 7th character is required for T34.521A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T34.521A group to?
T34.521A 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, T34.521A 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 T34.521A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T34.52, the nearest indexed parent of T34.521A. Use them to find the family, then select the specific code.
- Frostbite › hand › with tissue necrosis (superficial)
Use additional code — inherited from Chapter 19
Report an additional code alongside T34.521A to fully describe the condition. T34.521A 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 T34.521A, but a patient may have both at the same time. When documentation supports it, T34.521A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T33-T34
The conditions below are not part of T34.521A, but a patient may have both at the same time. When documentation supports it, T34.521A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T34.52
The conditions below are not part of T34.521A, but a patient may have both at the same time. When documentation supports it, T34.521A and the excluded code may both be reported.
- frostbite with tissue necrosis of finger(s) (T34.53-)
How long has T34.521A existed?
T34.521A 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.