MEMORANDUM

Appellant Pamela Lee, a former employee of Kaiser Foundation Health Plan, Inc. (“Kaiser”), appeals from the district court’s order granting summary judgment. In the district court, Lee unsuccessfully disputed the benefit determination by Metropolitan Life Insurance Co. (“MetLife”), the third-party administrator of her employer-sponsored long-term disability (LTD) program, a plan subject to the Employee Retirement Income Security Act of 1974 (ERISA), 29 U.S.C. § 1001 et seq. We affirm the district court in full.

I

When governing documents confer discretion on the administrator of an ERISA plan, courts review its determinations for abuse of discretion. See, e.g., Conkright v. Frommert, 559 U.S. 506, 512 , 130 S.Ct. 1640 , 176 L.Ed.2d 469 (2010). The documents governing Kaiser’s LTD benefit program, read together, unambiguously delegated “complete discretionary authority” to MetLife and mandated that Met-Life’s determination “be given the maximum possible deference allowed by law.” See Kearney v. Standard Ins. Co., 175 F.3d 1084, 1090 (9th Cir.1999) (en banc). Furthermore, structural conflicts, such as when an insurance company is both fiduciary of a plan and payor of the benefits thereunder, do not divest the administrator of his delegated discretion. Metro. Life Ins. Co. v. Glenn, 554 U.S. 105 , 115—16, 128 S.Ct. 2343 , 171 L.Ed.2d 299 (2008). Rather, they weigh more or less heavily as factors in the abuse-of-discretion calculus. See Firestone Tire & Rubber Co. v. Bruch, 489 U.S. 101, 115 , 109 S.Ct. 948 , 103 L.Ed.2d 80 (1989); see also Abatie v. Alta Health & Life Ins. Co., 458 F.3d 955, 967 (9th Cir.2006) (en banc) (“We read Firestone to require abuse of discretion review whenever an ERISA plan grants discretion to the plan administrator, but a review informed by the nature, extent, and effect on the decision-making process of any conflict of interest that may appear in the record.”). The district court properly reviewed MetLife’s decision for abuse of discretion.

Lee has not shown that MetLife’s structural conflict as both administrator and payor weighs heavily against its exercise of discretion in her case. In the first place, Lee has not offered any credible evidence that MetLife’s procedures are unreasonable. Secondly, her allegations concerning the bias of the independent physician consultants (IPCs), whose reports MetLife considered in making its final determination, are speculative and conclusory.

II

By determining that Lee’s putative disability qualified as a “Mental or Nervous Disorder or Disease,” and thereby limiting her LTD benefits to twenty-four months pursuant to the provisions of the plan documents, MetLife did not abuse its discretion. Unlike the plans at issue in Patterson v. Hughes Aircraft Co., 11 F.3d 948, 950-51 (9th Cir.1993), and Lang v. Long-Term Disability Plan of Sponsor Applied Remote Technology, Inc., 125 F.3d 794, 799 (9th Cir.1997), the benefit limitation applicable to psychiatric disabilities does not suffer from ambiguity. Thus, Lee has not demonstrated that MetLife acted unreasonably by paying Lee only twenty-four months of benefits. See Salomaa v. Honda Long Term Disability Plan, 642 F.3d 666, 675-76 (9th Cir.2011).

AFFIRMED.

This disposition is not appropriate for publication and is not precedent except as provided by 9th Cir. R. 36-3. . "We review de novo the district court's grant of summary judgment”; in the context of ERISA cases, this standard requires us to "review de novo a district court’s choice and application of the standard of review to decisions by fiduciaries.” Gilliam v. Nev. Power Co., 488 F.3d 1189 , 1192 n. 3 (9th Cir.2007) (internal quotation marks omitted). . We decline to address Lee’s argument that the California Insurance Commissioner withdrew approval of the contract. Lee summarily mentioned such argument in her opening brief and did not cite any legal authority, and offered only a terse description in her reply. She has failed, therefore, to raise the issue adequately. See Retlaw Broad. Co. v. NLRB, 53 F.3d 1002 , 1005 n. 1 (9th Cir.1995). . Such allegations, furthermore, are insufficient to show that the district court improperly denied her discovery concerning the bias of one IPC. .The relevant plan document defines “Mental or Nervous Disorder or Disease,” as "a medical condition of sufficient severity to meet the diagnostic criteria established in the current Diagnostic And Statistical Manual Of Mental Disorders.” If Lee’s disabling condition meets these criteria, then whether it arose from physical causes, psychiatric causes, or a combination of both is irrelevant.