T79.9XXA ICD-10-CM Code: Unspecified early complication of trauma, 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 T79.9XXA in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- 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 T79.9XXA 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 T79.9XXA in its code family, with their registry titles.
- T79.8 — Other early complications of trauma
- T79.8XXA — Other early complications of trauma, initial encounter
- T79.8XXD — Other early complications of trauma, subsequent encounter
- T79.8XXS — Other early complications of trauma, sequela
- T79.9 — Unspecified early complication of trauma
- T79.9XXD — Unspecified early complication of trauma, subsequent encounter
- T79.9XXS — Unspecified early complication of trauma, sequela
- T79.A — Traumatic compartment syndrome
- T79.A0 — Compartment syndrome, unspecified
- T79.A0XA — Compartment syndrome, unspecified, initial encounter