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ICD-10-CM 2027 diagnosis code

Y36.7X1DWar operations involving chemical weapons and other forms of unconventional warfare, civilian, subsequent encounter

✓ Billable / specificPOA exemptRequires 7th character

Y36.7X1D is a valid, billable ICD-10-CM code for war operations involving chemical weapons and other forms of unconventional warfare, civilian, subsequent encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: War op w chem weapons and oth unconvtl warfare, civ, 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 Y36.7X1D

Y36.7X1D is the ICD-10-CM diagnosis code for war operations involving chemical weapons and other forms of unconventional warfare, civilian, subsequent 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 "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 E997.0 (injury due to war operations by lasers), E997.2 (injury due to war operations by gases, fumes, and chemicals) and E997.9 (injury due to unspecified form of unconventional warfare).

7th character

Dsubsequent encounter

Other encounter types for Y36.7X1:

Notes that apply from higher levels

Instructions written at a parent level also apply to Y36.7X1D.

› From Y36.7 War operations involving chemical weapons and other forms of unconventional warfare
Excludes1
  • war operations involving incendiary devices (Y36.3-, Y36.5-)
› 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.

ICD-9-CM equivalent

Converter →
  • E997.0Injury due to war operations by lasersapproximate
  • E997.2Injury due to war operations by gases, fumes, and chemicalsapproximate
  • E997.9Injury due to unspecified form of unconventional warfareapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Y36.7X1D

Is Y36.7X1D billable?

Yes. Y36.7X1D 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 Y36.7X1D 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 Y36.7X1D be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y36.7X1D as a principal diagnosis.

Is Y36.7X1D a CC or MCC?

No. Y36.7X1D is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for Y36.7X1D?

The CMS General Equivalence Mappings map Y36.7X1D to ICD-9-CM E997.0, E997.2 and E997.9.