M89.129 ICD-10-CM Code: Physeal arrest, humerus, unspecified
HCC Buddy Code Card
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FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Other osteopathies (M86-M90)
M89.129
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePhyseal arrest, humerus, unspecified
A condition where the growth plate in the upper arm bone has stopped growing, but the specific location (left or right) or whether it is partial or complete is not specified in the documentation.
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
OfficialICD-10-CM does not list inclusion terms for M89.129 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for M89.129 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for M89.129 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for M89.129 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for M89.129 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for M89.129 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for M89.129 in this effective period.
Buddy Documentation Tip
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 M89.129 an HCC code?
No. M89.129 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- M89.129
- Description
- Physeal arrest, humerus, unspecified
- 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
M89.129 is the ICD-10-CM diagnosis code for physeal arrest, humerus, unspecified. A condition where the growth plate in the upper arm bone has stopped growing, but the specific location (left or right) or whether it is partial or complete is not specified in the documentation. M89.129 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).
M89.129 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.
Use only when the side (left/right) or completeness (partial/complete) cannot be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M89.129 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use only when the side (left/right) or completeness (partial/complete) cannot be determined from documentation
- •Query provider for more specific information when possible to assign a more precise code