The Tenth Circuit upheld a claims administrator’s decision denying a claim for residential mental health treatment as not medically necessary. In so holding, the Court rejected plaintiff’s argument that the claims administrator’s refusal to produce data on its historical denial rates for mental health treatment warranted a de novo review because that information was not relevant to whether the benefit denial was made in accordance with the plan document. The case is Mary D. v. Anthem Blue Cross Blue Shield, No. 16-cv-00124, 2019 WL 3072468 (10th Cir. July 15, 2019).