A08.2 ICD-10-CM Code: Adenoviral enteritis

A08.2 is the ICD-10-CM diagnosis code for adenoviral enteritis. Adenoviral enteritis is an infection of the small intestine caused by adenovirus, typically resulting in inflammation, diarrhea, and abdominal discomfort. This is a common viral infection that usually resolves on its own within a few days to a week. A08.2 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering intestinal infectious diseases (a00-a09).

A08.2 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.

Verify the documentation specifically identifies adenovirus as the causative agent; do not assume viral enteritis is adenoviral without explicit confirmation.