ICD-10-CM 2027 diagnosis code
Y37.321DMilitary operations involving incendiary bullet, civilian, subsequent encounter
Y37.321D is a valid, billable ICD-10-CM code for military operations involving incendiary bullet, civilian, subsequent encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Milt op involving incendiary bullet, civilian, subs
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 Y37.321D
Y37.321D is the ICD-10-CM diagnosis code for military operations involving incendiary bullet, civilian, subsequent encounter. It belongs to category Y37 (military operations), 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 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 E990.2 (injury due to war operations from incendiary bullet).
7th character
Dsubsequent encounter
Other encounter types for Y37.321:
Notes that apply from higher levels
Instructions written at a parent level also apply to Y37.321D.
› From Y37.3 Military operations involving fires, conflagrations and hot substances
- military operations involving fires and conflagrations aboard military aircraft (Y37.1-)
- military operations involving fires and conflagrations aboard military watercraft (Y37.0-)
- military operations involving fires and conflagrations caused indirectly by conventional weapons (Y37.2-)
- military operations involving fires and thermal effects of nuclear weapons (Y36.53-)
› From Y37 Military operations
- injuries to military personnel and civilians occurring during peacetime on military property and during routine military exercises and operations
- military aircraft involved in aircraft accident with civilian aircraft (V97.81-)
- military vehicles involved in transport accident with civilian vehicle (V09.01, V09.21, V19.81, V29.818, V39.81, V49.81, V59.81, V69.81, V79.81)
- military watercraft involved in water transport accident with civilian watercraft (V94.81-)
- war operations (Y36.-)
Broader instructions also apply from Chapter 20: External causes of morbidity.
ICD-9-CM equivalent
Converter →- E990.2Injury due to war operations from incendiary bulletapproximate
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 Y37.321D
Is Y37.321D billable?
- Yes. Y37.321D 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 Y37.321D 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 Y37.321D be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Y37.321D as a principal diagnosis.
Is Y37.321D a CC or MCC?
- No. Y37.321D is neither a CC nor an MCC under MS-DRG v44.0.
What is the ICD-9 code for Y37.321D?
- The CMS General Equivalence Mappings map Y37.321D to ICD-9-CM E990.2.