Z46.9
BillableEncounter for fitting and adjustment of unspecified device
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is Z46.9 an HCC code?
No. Z46.9 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
Z46.9 is the ICD-10-CM diagnosis code for encounter for fitting and adjustment of unspecified device. A patient visit to have an unspecified medical device fitted, adjusted, or modified to ensure proper function and comfort. Z46.9 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).
Z46.9 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 only when the specific type of device cannot be determined; if device type is known, use more specific Z46 codes.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z46.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use only when the specific type of device cannot be determined; if device type is known, use more specific Z46 codes
- •This is a follow-up/adjustment visit, not the initial device insertion