ICD-10-CM 2027 diagnosis code
Y38.5X1ATerrorism involving nuclear weapons, public safety official injured, initial encounter
Y38.5X1A is a valid, billable ICD-10-CM code for terrorism involving nuclear weapons, public safety official injured, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Terrorism w nuclear weapons, publ sfty offcl injured, init
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 Y38.5X1A
Y38.5X1A is the ICD-10-CM diagnosis code for terrorism involving nuclear weapons, public safety official injured, initial encounter. It belongs to category Y38 (terrorism), 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.
Use an additional code for place of occurrence (Y92.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
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 E979.5 (terrorism involving nuclear weapons).
7th character
Ainitial encounter
Other encounter types for Y38.5X1:
Notes that apply from higher levels
Instructions written at a parent level also apply to Y38.5X1A.
› From Y38 Terrorism
- code for place of occurrence (Y92.-)
Broader instructions also apply from Chapter 20: External causes of morbidity.
ICD-9-CM equivalent
Converter →- E979.5Terrorism involving nuclear weaponsapproximate
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 Y38.5X1A
Is Y38.5X1A billable?
- Yes. Y38.5X1A 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 Y38.5X1A 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 Y38.5X1A be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Y38.5X1A as a principal diagnosis.
Is Y38.5X1A a CC or MCC?
- No. Y38.5X1A is neither a CC nor an MCC under MS-DRG v44.0.
What is the ICD-9 code for Y38.5X1A?
- The CMS General Equivalence Mappings map Y38.5X1A to ICD-9-CM E979.5.