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ICD-10-CM 2027 diagnosis code

Y35.209DLegal intervention involving unspecified gas, unspecified person injured, subsequent encounter

✓ Billable / specificPOA exemptRequires 7th character

Y35.209D is a valid, billable ICD-10-CM code for legal intervention involving unspecified gas, unspecified person injured, subsequent encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Legal intervnt involving unsp gas, unsp person injured, subs

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 Y35.209D

Y35.209D is the ICD-10-CM diagnosis code for legal intervention involving unspecified gas, unspecified person injured, subsequent 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 "D" means subsequent encounter: use it for encounters after active treatment, while the patient is healing or recovering.

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

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

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

7th character

Dsubsequent encounter

Other encounter types for Y35.209:

Notes that apply from higher levels

Instructions written at a parent level also apply to Y35.209D.

› 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 Y35.209D

Is Y35.209D billable?

Yes. Y35.209D is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "D" at the end of Y35.209D mean?

It is the 7th character for subsequent encounter. Per the official guidelines, use it for encounters after active treatment, while the patient is healing or recovering.

Can Y35.209D be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y35.209D as a principal diagnosis.

Is Y35.209D a CC or MCC?

No. Y35.209D is neither a CC nor an MCC under MS-DRG v44.0.