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ICD-10-CM 2027 diagnosis code

Y36.A1XSLow level blast overpressure in war operations, sequela

✓ Billable / specificPOA exemptRequires 7th character

Y36.A1XS is a valid, billable ICD-10-CM code for low level blast overpressure in war 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 Y36.A1XS

Y36.A1XS is the ICD-10-CM diagnosis code for low level blast overpressure in war operations, sequela. 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 "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 Y36.A1:

Notes that apply from higher levels

Instructions written at a parent level also apply to Y36.A1XS.

› From Y36.A Blast overpressure in war operations
Code also
  • type of explosive, if known
  • accidental detonation of onboard munitions (Y36.140)
  • explosion of grenade (Y36.290)
  • explosion of torpedo (Y36.040)
  • improvised explosive device (Y36.230)
› From Y36 Operations of war
Includes
  • injuries to military personnel and civilians caused by war, civil insurrection, and peacekeeping missions
Excludes1

Broader instructions also apply from Chapter 20: External causes of morbidity.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2026 (effective 10/1/2025): Added
  • No changes since FY2026.

Common questions about Y36.A1XS

Is Y36.A1XS billable?

Yes. Y36.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 Y36.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 Y36.A1XS be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y36.A1XS as a principal diagnosis.

Is Y36.A1XS a CC or MCC?

No. Y36.A1XS is neither a CC nor an MCC under MS-DRG v44.0.