Z44.029 ICD-10-CM Code: Encounter for fitting and adjustment of partial artificial arm, unspecified arm
HCC Buddy Code Card
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FY 2026 Apr update / Factors influencing health status and contact with health services (Z00-Z99) / Encounters for other specific health care (Z40-Z53)
Z44.029
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceEncounter for fitting and adjustment of partial artificial arm, unspecified arm
A patient visit to have a partial artificial arm fitted or adjusted when the specific side (right or left) is not documented or is bilateral.
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 Z44.029 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z44.029 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z44.029 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z44.029 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z44.029 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z44.029 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z44.029 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 Z44.029 an HCC code?
No. Z44.029 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Z44.029
- Description
- Encounter for fitting and adjustment of partial artificial arm, unspecified arm
- 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
Z44.029 is the ICD-10-CM diagnosis code for encounter for fitting and adjustment of partial artificial arm, unspecified arm. A patient visit to have a partial artificial arm fitted or adjusted when the specific side (right or left) is not documented or is bilateral. Z44.029 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering encounters for other specific health care (z40-z53).
Z44.029 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 this code only when laterality cannot be determined from the documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z44.029 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when laterality cannot be determined from the documentation
- •Query the provider if possible to determine which arm is being fitted for more specific coding

