T21.31XA — Burn of third degree of chest wall, initial encounter
Is T21.31XA billable?
Yes — T21.31XA is billable for FY2027. T21.31XA is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T21.31XA may be submitted for encounters from October 1, 2026 through September 30, 2027.
T21.31XA at a glance
| Code | T21.31XA |
|---|---|
| Description | Burn of third degree of chest wall, 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 T21.31XA?
In T21.31XA, the 7th character A means initial encounter. The 7th character is required for T21.31XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T21.31XA group to?
T21.31XA sits in MDC 22 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.
- 927Extensive Burns or Full Thickness Burns with MV >96 Hours with Skin Graftsurgical
- 933Extensive Burns or Full Thickness Burns with MV >96 Hours without Skin Graftmedical
As a secondary diagnosis, T21.31XA 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 T21.31XA listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T21.31, the nearest indexed parent of T21.31XA. Use them to find the family, then select the specific code.
- Burn › chest wall › third degree (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)
Inclusion terms
Alternative wording in documentation that is classified to T21.31XA.
- Burn of third degree of breast
Use additional code — inherited from Chapter 19
Report an additional code alongside T21.31XA to fully describe the condition. T21.31XA is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T20-T25
Report an additional code alongside T21.31XA to fully describe the condition. T21.31XA is sequenced first.
Use additional code — inherited from T21.3
Report an additional code alongside T21.31XA to fully describe the condition. T21.31XA is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T21.31XA, but a patient may have both at the same time. When documentation supports it, T21.31XA and the excluded code may both be reported.
Excludes2 — not included here — inherited from T21
The conditions below are not part of T21.31XA, but a patient may have both at the same time. When documentation supports it, T21.31XA and the excluded code may both be reported.
How long has T21.31XA existed?
T21.31XA 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.