ICD-10-CM 2027 diagnosis code
Y37.A1XSLow level blast overpressure in military operations, sequela
Y37.A1XS is a valid, billable ICD-10-CM code for low level blast overpressure in military operations, sequela. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Y37.A1XS
Y37.A1XS is the ICD-10-CM diagnosis code for low level blast overpressure in military operations, sequela. 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 "S" means sequela: use it for complications or conditions that arise as a direct result of the original 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 was added in FY2026, effective October 1, 2025.
7th character
Ssequela
Other encounter types for Y37.A1:
Notes that apply from higher levels
Instructions written at a parent level also apply to Y37.A1XS.
› 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.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2026 (effective 10/1/2025): Added
- No changes since FY2026.
Common questions about Y37.A1XS
Is Y37.A1XS billable?
- Yes. Y37.A1XS is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
What does the "S" at the end of Y37.A1XS mean?
- It is the 7th character for sequela. Per the official guidelines, use it for complications or conditions that arise as a direct result of the original condition.
Can Y37.A1XS be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Y37.A1XS as a principal diagnosis.
Is Y37.A1XS a CC or MCC?
- No. Y37.A1XS is neither a CC nor an MCC under MS-DRG v44.0.