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Z44.029 ICD-10-CM Code: Encounter for fitting and adjustment of partial artificial arm, unspecified arm

ICD-10-CM Code View

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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 guidance

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.

CMS-HCC V28

N/A

Not mapped

CMS-HCC V24

N/A

Not mapped

ACA/HHS

HCC 254

Varies by metal level

ESRD/PACE

N/A

Not mapped

RXHCC

N/A

Not mapped

Code Book Path

Official
Z44.0Encounter for fitting and adjustment of artificial arm
Z44.02Encounter for fitting and adjustment of partial artificial arm
Z44.029Encounter for fitting and adjustment of partial artificial arm, unspecified arm

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for Z44.029 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for Z44.029 in this effective period.

Related Child Codes

Official
Z44.021Encounter for fitting and adjustment of partial artificial right arm
Z44.022Encounter for fitting and adjustment of partial artificial left arm

Includes

Official

ICD-10-CM does not list Includes notes for Z44.029 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for Z44.029 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for Z44.029 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for Z44.029 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for Z44.029 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance
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

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

Child Codes

Code Hierarchy

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