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M84.451G ICD-10-CM Code: Pathological fracture, right femur, subsequent encounter for fracture with delayed healing

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FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Disorders of bone density and structure (M80-M85)

M84.451G

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

Pathological fracture, right femur, subsequent encounter for fracture with delayed healing

Pathological fracture, right femur, subsequent encounter for fracture with delayed healing

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

Basket needed

Code Book Path

Official
M84.45Pathological fracture, femur and pelvis
M84.451Pathological fracture, right femur
M84.451GPathological fracture, right femur, subsequent encounter for fracture with delayed healing

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for M84.451G in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for M84.451G in this effective period.

Related Child Codes

Official
M84.451APathological fracture, right femur, initial encounter for fracture
M84.451DPathological fracture, right femur, subsequent encounter for fracture with routine healing
M84.451KPathological fracture, right femur, subsequent encounter for fracture with nonunion
M84.451PPathological fracture, right femur, subsequent encounter for fracture with malunion
M84.451SPathological fracture, right femur, sequela

Includes

Official

ICD-10-CM does not list Includes notes for M84.451G in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for M84.451G in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for M84.451G in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for M84.451G in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for M84.451G 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 M84.451G an HCC code?

No. M84.451G 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

M84.451G is the ICD-10-CM diagnosis code for pathological fracture, right femur, subsequent encounter for fracture with delayed healing. M84.451G sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of bone density and structure (m80-m85).

M84.451G 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.

M84.451G 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 M84.451G 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 M84.451G 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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