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W59.12XS ICD-10-CM Code: Struck by nonvenomous snake, sequela

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FY 2026 Apr update / External causes of morbidity (V00-Y99) / Exposure to animate mechanical forces (W50-W64)

W59.12XS

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

Struck by nonvenomous snake, sequela

Struck by nonvenomous snake, 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
W5912XExposure to animate mechanical forces (W50-W64)
W59.12XSStruck by nonvenomous snake, sequela

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for W59.12XS in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for W59.12XS in this effective period.

Related Child Codes

Official
W59.12XAStruck by nonvenomous snake, initial encounter
W59.12XDStruck by nonvenomous snake, subsequent encounter

Includes

Official

ICD-10-CM does not list Includes notes for W59.12XS in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for W59.12XS in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for W59.12XS in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for W59.12XS in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for W59.12XS 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 W59.12XS an HCC code?

No. W59.12XS 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

W59.12XS is the ICD-10-CM diagnosis code for struck by nonvenomous snake, sequela. W59.12XS sits in the ICD-10-CM chapter for external causes of morbidity (v00-y99), within the section covering exposure to animate mechanical forces (w50-w64).

W59.12XS 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.

W59.12XS 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 W59.12XS 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 W59.12XS sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Child Codes

Code Hierarchy

W59.12XSStruck by nonvenomous snake, sequela
W59.12XSStruck by nonvenomous snake, sequela

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