Z89.011 ICD-10-CM Code: Acquired absence of right thumb

Z89.011 is the ICD-10-CM diagnosis code for acquired absence of right thumb. A patient is missing their right thumb due to amputation, injury, or surgical removal that occurred after birth. Z89.011 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).

Z89.011 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.

This code indicates an acquired (not congenital) absence; verify the thumb was lost after birth.