ICD-10-CM 2027 diagnosis code
Y35.9Legal intervention, means unspecified
Y35.9 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it and add the required 7th character.
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 Y35.9
Y35.9 is the ICD-10-CM diagnosis code for legal intervention, means unspecified. 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 a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
Within Y35, choose Y35.9 (means unspecified) only when documentation doesn't support a more specific option: involving firearm discharge (Y35.0), involving explosives (Y35.1), involving gas (Y35.2), involving blunt objects (Y35.3), involving sharp objects (Y35.4) and involving other specified means (Y35.8).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category Y35
- Y35.91Legal intervention, means unspecified, law enforcement official injured
- Y35.92Legal intervention, means unspecified, bystander injured
- Y35.93Legal intervention, means unspecified, suspect injured
- Y35.99Legal intervention, means unspecified, unspecified person injured
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Notes that apply from higher levels
Instructions written at a parent level also apply to Y35.9.
› From Y35 Legal intervention
- 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
- 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 Y35.9
Is Y35.9 billable?
- No. Y35.9 is a header code. Report one of its more specific subcodes instead.