Yufan Zhang v. UnitedHealth Group; Sujatha Duraimanickam
June 17, 2026·25-2679·Panel Decision·By Maria Santos
The United States Court of Appeals for the Eighth Circuit affirmed the dismissal of a civil action brought by Yufan Zhang. The court held that the district court correctly applied res judicata and collateral estoppel based on prior federal decisions and arbitration.
Yufan Zhang appealed the district court’s dismissal of his civil action. The dismissal was based on the argument that the claims were precluded by adverse decisions in a prior federal action and arbitration.
The court’s reasoning
The court conducted a de novo review of the dismissal on res judicata and collateral estoppel grounds. After reviewing the record and the parties’ arguments, the court found no basis for reversal. The court granted the parties’ motions for judicial notice of court records from the prior proceedings but denied Zhang’s motion to the extent it sought judicial notice of other documents.
What it means going forward
The decision reinforces the application of res judicata and collateral estoppel to bar civil actions when claims have been previously adjudicated in federal court or arbitration.
