Z89.121 ICD-10-CM Code: Acquired absence of right wrist
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 / Factors influencing health status and contact with health services (Z00-Z99) / Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
Z89.121
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAcquired absence of right wrist
The person has lost their right hand at or near the wrist level, either due to amputation, accident, or surgical removal.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
Official- Disarticulation at wrist
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z89.121 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z89.121 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z89.121 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z89.121 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z89.121 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z89.121 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 Z89.121 an HCC code?
No. Z89.121 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
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
Z89.121 is the ICD-10-CM diagnosis code for acquired absence of right wrist. The person has lost their right hand at or near the wrist level, either due to amputation, accident, or surgical removal. Z89.121 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering persons with potential health hazards related to family and personal history and certain conditions influencing health status (z77-z99).
Z89.121 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.
This code specifically indicates the RIGHT wrist; verify laterality in documentation before coding.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z89.121 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code specifically indicates the RIGHT wrist; verify laterality in documentation before coding
- •Use this for wrist-level amputations; if the amputation is higher (forearm or above), select a different Z89.2x code