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W40.0XXA ICD-10-CM Code: Explosion of blasting material, initial encounter

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FY 2026 Apr update / External causes of morbidity (V00-Y99) / Exposure to inanimate mechanical forces (W20-W49)

W40.0XXA

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

Explosion of blasting material, initial encounter

Explosion of blasting material, initial encounter

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
W400XXExposure to inanimate mechanical forces (W20-W49)
W40.0XXAExplosion of blasting material, initial encounter

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for W40.0XXA in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for W40.0XXA in this effective period.

Related Child Codes

Official
W40.0XXDExplosion of blasting material, subsequent encounter
W40.0XXSExplosion of blasting material, sequela

Includes

Official

ICD-10-CM does not list Includes notes for W40.0XXA in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for W40.0XXA in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for W40.0XXA in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for W40.0XXA in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for W40.0XXA 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 W40.0XXA an HCC code?

No. W40.0XXA 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

W40.0XXA is the ICD-10-CM diagnosis code for explosion of blasting material, initial encounter. W40.0XXA sits in the ICD-10-CM chapter for external causes of morbidity (v00-y99), within the section covering exposure to inanimate mechanical forces (w20-w49).

W40.0XXA 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.

W40.0XXA 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 W40.0XXA 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 W40.0XXA sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Child Codes

Code Hierarchy

W40.0XXAExplosion of blasting material, initial encounter
W40.0XXAExplosion of blasting material, initial encounter

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