T79.A9XS — Traumatic compartment syndrome of other sites, sequela
Is T79.A9XS billable?
Yes — T79.A9XS is billable for FY2027. T79.A9XS is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T79.A9XS may be submitted for encounters from October 1, 2026 through September 30, 2027.
T79.A9XS at a glance
| Code | T79.A9XS |
|---|---|
| Description | Traumatic compartment syndrome of other sites, 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 T79.A9XS?
In T79.A9XS, the 7th character S means sequela. The 7th character is required for T79.A9XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T79.A9XS group to?
T79.A9XS 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.
- 913Traumatic Injury with MCCmedical
- 914Traumatic Injury without MCCmedical
How is T79.A9XS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T79.A9, the nearest indexed parent of T79.A9XS. Use them to find the family, then select the specific code.
- Compartment syndrome › specified site NEC (deep) (posterior) (traumatic)
- Syndrome › compartment › specified site NEC
Excludes1 — never code together — inherited from T79.A
The conditions below can never be reported together with T79.A9XS on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from Chapter 19
Report an additional code alongside T79.A9XS to fully describe the condition. T79.A9XS 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 T79.A9XS, but a patient may have both at the same time. When documentation supports it, T79.A9XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from T79
The conditions below are not part of T79.A9XS, but a patient may have both at the same time. When documentation supports it, T79.A9XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from T79.A
The conditions below are not part of T79.A9XS, but a patient may have both at the same time. When documentation supports it, T79.A9XS and the excluded code may both be reported.
- traumatic ischemic infarction of muscle (T79.6)
How long has T79.A9XS existed?
T79.A9XS 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.