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Y37.391S ICD-10-CM Code: Military operations involving other fires, conflagrations and hot substances, civilian, 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)

Y37.391S

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

Military operations involving other fires, conflagrations and hot substances, civilian, sequela

Military operations involving other fires, conflagrations and hot substances, civilian, 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
Y37.39Military operations involving other fires, conflagrations and hot substances
Y37.391Military operations involving other fires, conflagrations and hot substances, civilian
Y37.391SMilitary operations involving other fires, conflagrations and hot substances, civilian, sequela

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for Y37.391S in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for Y37.391S in this effective period.

Related Child Codes

Official
Y37.391AMilitary operations involving other fires, conflagrations and hot substances, civilian, initial encounter
Y37.391DMilitary operations involving other fires, conflagrations and hot substances, civilian, subsequent encounter

Includes

Official

ICD-10-CM does not list Includes notes for Y37.391S in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for Y37.391S in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for Y37.391S in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for Y37.391S in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for Y37.391S 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 Y37.391S an HCC code?

No. Y37.391S 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

Y37.391S is the ICD-10-CM diagnosis code for military operations involving other fires, conflagrations and hot substances, civilian, sequela. Y37.391S 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).

Y37.391S 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.

Y37.391S 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 Y37.391S 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 Y37.391S 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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