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ICD-10-CM 2027 diagnosis code

Y36.231DWar operations involving explosion of improvised explosive device [IED], civilian, subsequent encounter

✓ Billable / specificPOA exemptRequires 7th character

Y36.231D is a valid, billable ICD-10-CM code for war operations involving explosion of improvised explosive device [ied], 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 explosn of improv explosv device, civilian, 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 Y36.231D

Y36.231D is the ICD-10-CM diagnosis code for war operations involving explosion of improvised explosive device [IED], 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 E993.3 (injury due to war operations by person-borne improvised explosive device [IED]), E993.4 (injury due to war operations by vehicle-borne improvised explosive device [IED]) and E993.5 (injury due to war operations by other improvised explosive device [IED]).

7th character

Dsubsequent encounter

Other encounter types for Y36.231:

Notes that apply from higher levels

Instructions written at a parent level also apply to Y36.231D.

› From Y36.2 War operations involving other explosions and fragments
Excludes1
  • war operations involving explosion of aircraft (Y36.1-)
  • war operations involving explosion of marine weapons (Y36.0-)
  • war operations involving explosion of nuclear weapons (Y36.5-)
  • war operations involving explosion occurring after cessation of hostilities (Y36.8-)
› 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 →
  • E993.3Injury due to war operations by person-borne improvised explosive device [IED]approximate
  • E993.4Injury due to war operations by vehicle-borne improvised explosive device [IED]approximate
  • E993.5Injury due to war operations by other improvised explosive device [IED]approximate

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 Y36.231D

Is Y36.231D billable?

Yes. Y36.231D 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 Y36.231D 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 Y36.231D be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y36.231D as a principal diagnosis.

Is Y36.231D a CC or MCC?

No. Y36.231D is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for Y36.231D?

The CMS General Equivalence Mappings map Y36.231D to ICD-9-CM E993.3, E993.4 and E993.5.