Z89.9 ICD-10-CM Code: Acquired absence of limb, unspecified
HCC Buddy Code Card
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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)
Z89.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAcquired absence of limb, unspecified
A person who has lost one or more limbs, but the specific location or side is not documented or specified. This is a permanent condition affecting mobility.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
MappedHCC 254
Varies by metal level
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 Z89.9 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z89.9 in this effective period.
Related Child Codes
Includes
Official- amputation status
- postprocedural loss of limb
- post-traumatic loss of limb
Excludes 1
Official- acquired deformities of limbs (M20-M21)
- congenital absence of limbs (Q71-Q73)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z89.9 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z89.9 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z89.9 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 Z89.9 an HCC code?
No. Z89.9 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Z89.9
- Description
- Acquired absence of limb, 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
Z89.9 is the ICD-10-CM diagnosis code for acquired absence of limb, unspecified. A person who has lost one or more limbs, but the specific location or side is not documented or specified. This is a permanent condition affecting mobility. Z89.9 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).
Z89.9 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 as a last resort when the specific site of amputation cannot be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z89.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use only as a last resort when the specific site of amputation cannot be determined from documentation
- •Review medical record to identify the exact location (arm, leg, hand, foot, etc.) and assign more specific Z89 codes