M89.762 ICD-10-CM Code: Major osseous defect, left lower leg
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Other osteopathies (M86-M90)
M89.762
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceMajor osseous defect, left lower leg
A significant loss or defect in the bone structure of the left lower leg, including the tibia, fibula, or both bones.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Major osseous defect of fibula and tibia
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for M89.762 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for M89.762 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for M89.762 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for M89.762 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for M89.762 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for M89.762 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is M89.762 an HCC code?
No. M89.762 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- M89.762
- Description
- Major osseous defect, left lower leg
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
M89.762 is the ICD-10-CM diagnosis code for major osseous defect, left lower leg. A significant loss or defect in the bone structure of the left lower leg, including the tibia, fibula, or both bones. M89.762 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering other osteopathies (m86-m90).
M89.762 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.
Specify which bone(s) are affected (tibia, fibula, or both) in the clinical documentation when possible.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M89.762 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Specify which bone(s) are affected (tibia, fibula, or both) in the clinical documentation when possible
- •Ensure left side laterality is clearly documented to distinguish from M89.761