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ICD-10-CM 2027 diagnosis code

Y35.129ALegal intervention involving injury by explosive shell, unspecified person injured, initial encounter

✓ Billable / specificRequires 7th character

Y35.129A is a valid, billable ICD-10-CM code for legal intervention involving injury by explosive shell, unspecified person injured, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Legal intrvnt w inj by explosv shell, unsp person inj, init

Code last changed in FY2020 (effective October 1, 2019). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Y35.129A

Y35.129A is the ICD-10-CM diagnosis code for legal intervention involving injury by explosive shell, unspecified person injured, initial encounter. It belongs to category Y35 (legal intervention), block Y35-Y38 (legal intervention, operations of war, military operations, and terrorism) and chapter 20 (external causes of morbidity). 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 "A" means initial encounter: use it while the patient is receiving active treatment for the condition.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

It was added in FY2020, effective October 1, 2019.

7th character

Ainitial encounter

Other encounter types for Y35.129:

Notes that apply from higher levels

Instructions written at a parent level also apply to Y35.129A.

› From Y35 Legal intervention
Includes
  • any injury sustained as a result of an encounter with any law enforcement official, serving in any capacity at the time of the encounter, whether on-duty or off-duty. Includes: injury to law enforcement official, suspect and bystander

Broader instructions also apply from Chapter 20: External causes of morbidity.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2020 (effective 10/1/2019): Added
  • No changes since FY2020.

Common questions about Y35.129A

Is Y35.129A billable?

Yes. Y35.129A is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "A" at the end of Y35.129A mean?

It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.

Can Y35.129A be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y35.129A as a principal diagnosis.

Is Y35.129A a CC or MCC?

No. Y35.129A is neither a CC nor an MCC under MS-DRG v44.0.