Z91.A48
BillableCaregiver's other noncompliance with patient's medication regimen for other reason
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is Z91.A48 an HCC code?
No. Z91.A48 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
Z91.A48 is the ICD-10-CM diagnosis code for caregiver's other noncompliance with patient's medication regimen for other reason. A caregiver is not following the patient's medication regimen in ways other than underdosing for reasons unrelated to financial hardship. Z91.A48 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 family and personal history and certain conditions influencing health status (z77-z99).
Z91.A48 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 specific reason for noncompliance and the type of medication regimen issue.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z91.A48 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the specific reason for noncompliance and the type of medication regimen issue.
- •Use this code for various forms of medication noncompliance not covered by other more specific codes.