Z90.09
BillableAcquired absence of other part of head and neck
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is Z90.09 an HCC code?
No. Z90.09 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
Z90.09 is the ICD-10-CM diagnosis code for acquired absence of other part of head and neck. A person who has lost other parts of the head or neck region through surgery or injury, such as the nose, ear, jaw, or tongue. Z90.09 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).
Z90.09 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 this code for acquired absence of structures not specifically listed (eye, larynx); be specific in documentation about which structure is absent.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z90.09 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code for acquired absence of structures not specifically listed (eye, larynx); be specific in documentation about which structure is absent
- •Consider if reconstruction or prosthetic fitting is planned, as this may affect treatment planning
Excludes 2 — Not included here, may code separately
- teeth (K08.1)