Z89.021 ICD-10-CM Code: Acquired absence of right finger(s)
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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)
Z89.021
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAcquired absence of right finger(s)
A patient is missing one or more fingers on the right hand due to amputation, injury, or surgical removal that occurred after birth.
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 Z89.021 in this effective period.
Excludes 2
Official- acquired absence of thumb (Z89.01-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z89.021 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z89.021 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z89.021 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z89.021 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z89.021 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 Z89.021 an HCC code?
No. Z89.021 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Z89.021
- Description
- Acquired absence of right finger(s)
- 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
Z89.021 is the ICD-10-CM diagnosis code for acquired absence of right finger(s). A patient is missing one or more fingers on the right hand due to amputation, injury, or surgical removal that occurred after birth. Z89.021 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).
Z89.021 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 applies to any finger(s) except the thumb; use Z89.011 specifically for thumb absence.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z89.021 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code applies to any finger(s) except the thumb; use Z89.011 specifically for thumb absence
- •Document which specific fingers are absent if possible for better clinical clarity