"This marks the first time the DOL has brought litigation to enforce MHPAEA.... [P]lan sponsors should inquire into what document disclosures their carriers and TPAs are making in response to employees' requests for information on MH/SUD treatment limitations or claims guidelines.... [T]he scope of information required to be produced goes well beyond the plan document and summary plan description." [Walsh v. United Behavioral Health and UnitedHealthcare Ins. Co., No. 21-4519 (E.D.N.Y. settlement agreement filed Aug. 11, 2021); Walsh v. UnitedHealth Group Inc. and Oxford Health Ins. Inc., No. 21-4519 (E.D.N.Y. settlement agreement filed Aug. 11, 2021)]