Z65.5
BillableExposure to disaster, war and other hostilities
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is Z65.5 an HCC code?
No. Z65.5 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
Z65.5 is the ICD-10-CM diagnosis code for exposure to disaster, war and other hostilities. A person has been exposed to a disaster, war, or other hostile situation, which may affect their physical or mental health. Z65.5 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).
Z65.5 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 the type of exposure (natural disaster, war, terrorism) for clinical context.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z65.5 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the type of exposure (natural disaster, war, terrorism) for clinical context
- •This code may be used alongside codes for trauma-related conditions or injuries sustained during the event
Excludes 1 — Do NOT code together
- target of perceived discrimination or persecution (Z60.5)