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Y36.300S ICD-10-CM Code: War operations involving unspecified fire, conflagration and hot substance, military personnel, sequela

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FY 2026 Apr update / External causes of morbidity (V00-Y99) / Legal intervention, operations of war, military operations, and terrorism (Y35-Y38)

Y36.300S

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

War operations involving unspecified fire, conflagration and hot substance, military personnel, sequela

War operations involving unspecified fire, conflagration and hot substance, military personnel, sequela

CMS-HCC V28

0

0

RAF 0

CMS-HCC V24

0

0

RAF 0

ACA/HHS

0

0

RAF 0

ESRD/PACE

0

0

RAF 0

RXHCC

0

0

RAF 0

Code Trumping

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Code Book Path

Official
Y36.30War operations involving unspecified fire, conflagration and hot substance
Y36.300War operations involving unspecified fire, conflagration and hot substance, military personnel
Y36.300SWar operations involving unspecified fire, conflagration and hot substance, military personnel, sequela

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for Y36.300S in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for Y36.300S in this effective period.

Related Child Codes

Official
Y36.300AWar operations involving unspecified fire, conflagration and hot substance, military personnel, initial encounter
Y36.300DWar operations involving unspecified fire, conflagration and hot substance, military personnel, subsequent encounter

Includes

Official

ICD-10-CM does not list Includes notes for Y36.300S in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for Y36.300S in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for Y36.300S in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for Y36.300S in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for Y36.300S in this effective period.

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is Y36.300S an HCC code?

No. Y36.300S is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Y36.300S is the ICD-10-CM diagnosis code for war operations involving unspecified fire, conflagration and hot substance, military personnel, sequela. Y36.300S sits in the ICD-10-CM chapter for external causes of morbidity (v00-y99), within the section covering legal intervention, operations of war, military operations, and terrorism (y35-y38).

Y36.300S is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Y36.300S is a billable ICD-10-CM code that can be reported on claims but does not currently contribute to a Medicare Advantage member's RAF score under any CMS risk adjustment model (V28, V24, ESRD, or RxHCC). Coders reviewing Y36.300S should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Y36.300S sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Child Codes

Code Hierarchy

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