Z56.5
BillableUncongenial work environment
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is Z56.5 an HCC code?
No. Z56.5 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Z56.5 is the ICD-10-CM diagnosis code for uncongenial work environment. A patient's work environment is unpleasant, uncomfortable, or unsuitable in ways that are affecting their health or wellbeing. Z56.5 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 socioeconomic and psychosocial circumstances (z55-z65).
Z56.5 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.
Document specific environmental factors (poor ventilation, excessive noise, unsafe conditions, inadequate facilities).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z56.5 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document specific environmental factors (poor ventilation, excessive noise, unsafe conditions, inadequate facilities)
- •This code applies when the work environment itself is the stressor, not the work tasks