T79.A2 — Traumatic compartment syndrome of lower extremity
Is T79.A2 billable?
No — T79.A2 is a non-billable header code. T79.A2 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath T79.A2.
Billable codes under this header
- T79.A21ATraumatic compartment syndrome of right lower extremity, initial encounter
- T79.A21DTraumatic compartment syndrome of right lower extremity, subsequent encounter
- T79.A21STraumatic compartment syndrome of right lower extremity, sequela
- T79.A22ATraumatic compartment syndrome of left lower extremity, initial encounter
- T79.A22DTraumatic compartment syndrome of left lower extremity, subsequent encounter
- T79.A22STraumatic compartment syndrome of left lower extremity, sequela
- T79.A29ATraumatic compartment syndrome of unspecified lower extremity, initial encounter
- T79.A29DTraumatic compartment syndrome of unspecified lower extremity, subsequent encounter
- T79.A29STraumatic compartment syndrome of unspecified lower extremity, sequela
T79.A2 at a glance
| Code | T79.A2 |
|---|---|
| Description | Traumatic compartment syndrome of lower extremity |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is T79.A2 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to T79.A2. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Compartment syndrome › lower extremity (deep) (posterior) (traumatic)
- Syndrome › compartment › lower extremity
Inclusion terms
Alternative wording in documentation that is classified to T79.A2.
- Traumatic compartment syndrome of hip, buttock, thigh, leg, foot, and toes
Excludes1 — never code together — inherited from T79.A
The conditions below can never be reported together with T79.A2 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.A2 to fully describe the condition. T79.A2 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.A2, but a patient may have both at the same time. When documentation supports it, T79.A2 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T79
The conditions below are not part of T79.A2, but a patient may have both at the same time. When documentation supports it, T79.A2 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T79.A
The conditions below are not part of T79.A2, but a patient may have both at the same time. When documentation supports it, T79.A2 and the excluded code may both be reported.
- traumatic ischemic infarction of muscle (T79.6)
What codes fall under T79.A2? (3)
How long has T79.A2 existed?
T79.A2 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.