T79.9XXA — Unspecified early complication of trauma, initial encounter
Is T79.9XXA billable?
Yes, but T79.9XXA is an unspecified code. T79.9XXA is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T79.9XXA is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting T79.9XXA.
T79.9XXA at a glance
| Code | T79.9XXA |
|---|---|
| Description | Unspecified early complication of trauma, 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 T79.9XXA?
In T79.9XXA, the 7th character A means initial encounter. The 7th character is required for T79.9XXA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T79.9XXA group to?
T79.9XXA 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.
- 922Other Injury, Poisoning and Toxic Effect Diagnoses with MCCmedical
- 923Other Injury, Poisoning and Toxic Effect Diagnoses without MCCmedical
How is T79.9XXA listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T79.9, the nearest indexed parent of T79.9XXA. Use them to find the family, then select the specific code.
- Complication › trauma (s) (from) (of)
Use additional code — inherited from Chapter 19
Report an additional code alongside T79.9XXA to fully describe the condition. T79.9XXA 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 T79.9XXA, but a patient may have both at the same time. When documentation supports it, T79.9XXA and the excluded code may both be reported.
Excludes2 — not included here — inherited from T79
The conditions below are not part of T79.9XXA, but a patient may have both at the same time. When documentation supports it, T79.9XXA and the excluded code may both be reported.
How long has T79.9XXA existed?
T79.9XXA 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.