ICD-10-CM 2027 diagnosis code
T79.A29STraumatic compartment syndrome of unspecified lower extremity, sequela
T79.A29S is a valid, billable ICD-10-CM code for traumatic compartment syndrome of unspecified lower extremity, sequela. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Traumatic compartment syndrome of unsp low extrm, sequela
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T79.A29S
T79.A29S is the ICD-10-CM diagnosis code for traumatic compartment syndrome of unspecified lower extremity, sequela. It belongs to category T79 (certain early complications of trauma, not elsewhere classified), block T79 (certain early complications of trauma) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
The 7th character "S" means sequela: use it for complications or conditions that arise as a direct result of the original condition.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 913 (Traumatic Injury with MCC, relative weight 1.5455) and DRG 914 (Traumatic Injury without MCC, relative weight 0.9285), in MDC 21 (Injuries, Poisonings and Toxic Effects of Drugs), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 908.6 (late effect of certain complications of trauma).
7th character
Ssequela
CC/MCC status for this injury by encounter: CC for A; Neither CC nor MCC for D, S.
Other encounter types for T79.A29:
Notes that apply from higher levels
Instructions written at a parent level also apply to T79.A29S.
Broader instructions also apply from Chapter 19: Injury, poisoning and certain other consequences of external causes.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 21 · Injuries, Poisonings and Toxic Effects of Drugs
ICD-9-CM equivalent
Converter →- 908.6Late effect of certain complications of traumaapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T79.A29S
Is T79.A29S billable?
- Yes. T79.A29S is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
What does the "S" at the end of T79.A29S mean?
- It is the 7th character for sequela. Per the official guidelines, use it for complications or conditions that arise as a direct result of the original condition.
Can T79.A29S be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict T79.A29S as a principal diagnosis.
Is T79.A29S a CC or MCC?
- No. T79.A29S is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does T79.A29S group to?
- T79.A29S is used in the MS-DRG v44.0 logic for MS-DRG 913 (Traumatic Injury with MCC) and MS-DRG 914 (Traumatic Injury without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for T79.A29S?
- The CMS General Equivalence Mappings map T79.A29S to ICD-9-CM 908.6.