ICD-10-CM 2027 diagnosis code
Y36.331AWar operations involving flamethrower, civilian, initial encounter
Y36.331A is a valid, billable ICD-10-CM code for war operations involving flamethrower, civilian, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: War operations involving flamethrower, civilian, init encntr
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 Y36.331A
Y36.331A is the ICD-10-CM diagnosis code for war operations involving flamethrower, civilian, initial encounter. It belongs to category Y36 (operations of war), 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 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 E990.1 (injury due to war operations from flamethrower).
7th character
Ainitial encounter
Other encounter types for Y36.331:
Notes that apply from higher levels
Instructions written at a parent level also apply to Y36.331A.
› From Y36.3 War operations involving fires, conflagrations and hot substances
- war operations involving fires and conflagrations aboard military aircraft (Y36.1-)
- war operations involving fires and conflagrations aboard military watercraft (Y36.0-)
- war operations involving fires and conflagrations caused indirectly by conventional weapons (Y36.2-)
- war operations involving fires and thermal effects of nuclear weapons (Y36.53-)
› From Y36 Operations of war
- injuries to military personnel and civilians caused by war, civil insurrection, and peacekeeping missions
Broader instructions also apply from Chapter 20: External causes of morbidity.
ICD-9-CM equivalent
Converter →- E990.1Injury due to war operations from flamethrowerapproximate
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 Y36.331A
Is Y36.331A billable?
- Yes. Y36.331A 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 Y36.331A 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 Y36.331A be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Y36.331A as a principal diagnosis.
Is Y36.331A a CC or MCC?
- No. Y36.331A is neither a CC nor an MCC under MS-DRG v44.0.
What is the ICD-9 code for Y36.331A?
- The CMS General Equivalence Mappings map Y36.331A to ICD-9-CM E990.1.