ICD-10-CM 2027 diagnosis code
Z44.021Encounter for fitting and adjustment of partial artificial right arm
Z44.021 is a valid, billable ICD-10-CM code for encounter for fitting and adjustment of partial artificial right arm. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Encounter for fit/adjst of partial artificial right arm
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Z44.021
Z44.021 is the ICD-10-CM diagnosis code for encounter for fitting and adjustment of partial artificial right arm. It belongs to category Z44 (encounter for fitting and adjustment of external prosthetic device), block Z40-Z53 (Encounters for other specific health care) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within Z44.02 (encounter for fitting and adjustment of partial artificial arm), Z44.021 is specifically for encounter for fitting and adjustment of partial artificial right arm. Related codes cover left arm (Z44.022) and unspecified arm (Z44.029).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 559 (Aftercare, Musculoskeletal System and Connective Tissue with MCC, relative weight 1.8088), DRG 560 (Aftercare, Musculoskeletal System and Connective Tissue with CC, relative weight 1.1238) and DRG 561 (Aftercare, Musculoskeletal System and Connective Tissue without CC/MCC, relative weight 0.8258), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as V52.0 (fitting and adjustment of artificial arm (complete) (partial)).
Notes that apply from higher levels
Instructions written at a parent level also apply to Z44.021.
› From Z44 Encounter for fitting and adjustment of external prosthetic device
- removal or replacement of external prosthetic device
- malfunction or other complications of device - see Alphabetical Index
- presence of prosthetic device (Z97.-)
Broader instructions also apply from Z40-Z53 Encounters for other specific health care and Chapter 21: Factors influencing health status and contact with health services.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue
ICD-9-CM equivalent
Converter →- V52.0Fitting and adjustment of artificial arm (complete) (partial)approximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Z44.021
Is Z44.021 billable?
- Yes. Z44.021 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z44.021 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z44.021 as a principal diagnosis.
Is Z44.021 a CC or MCC?
- No. Z44.021 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z44.021 group to?
- Z44.021 is used in the MS-DRG v44.0 logic for MS-DRG 559 (Aftercare, Musculoskeletal System and Connective Tissue with MCC), MS-DRG 560 (Aftercare, Musculoskeletal System and Connective Tissue with CC) and MS-DRG 561 (Aftercare, Musculoskeletal System and Connective Tissue without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.