T79.A9XA ICD-10-CM Code: Traumatic compartment syndrome of other sites, initial encounter
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 922 — OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITH MCC (MDC 21)
- MS-DRG 923 — OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITHOUT MCC (MDC 21)
- MS-DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)
- MS-DRG 964 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC (MDC 24)
- MS-DRG 965 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC (MDC 24)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T79.A9XA in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- fibromyalgia (M79.7)
- nontraumatic compartment syndrome (M79.A-)
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- traumatic ischemic infarction of muscle (T79.6)
- acute respiratory distress syndrome (J80)
- complications occurring during or following medical procedures (T80-T88)
- complications of surgical and medical care NEC (T80-T88)
- newborn respiratory distress syndrome (P22.0)
Frequently Asked Questions (FAQ) & Clinical Guidance
Does T79.A9XA require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T79.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T79.A9XA in its code family, with their registry titles.
- T79.A29 — Traumatic compartment syndrome of unspecified lower extremity
- T79.A29A — Traumatic compartment syndrome of unspecified lower extremity, initial encounter
- T79.A29D — Traumatic compartment syndrome of unspecified lower extremity, subsequent encounter
- T79.A29S — Traumatic compartment syndrome of unspecified lower extremity, sequela
- T79.A3 — Traumatic compartment syndrome of abdomen
- T79.A3XA — Traumatic compartment syndrome of abdomen, initial encounter
- T79.A3XD — Traumatic compartment syndrome of abdomen, subsequent encounter
- T79.A3XS — Traumatic compartment syndrome of abdomen, sequela
- T79.A9 — Traumatic compartment syndrome of other sites
- T79.A9XD — Traumatic compartment syndrome of other sites, subsequent encounter