Rita F. Cogbill appeals the district court’s 1 order affirming the denial of disability insurance benefits. Upon careful review of the record, see Gates v. Astrue, 627 F.3d 1080, 1082 (8th Cir. 2010) (standard of review), we conclude that the administrative law judge (ALJ) gave several valid reasons for his adverse credibility determination, and thus it is entitled to deference, see Halverson v. Astrue, 600 F.3d 922, 932 (8th Cir. 2010); that the ALJ was not required to schedule a consultative mental examination, see id. at 933 (ALJ is required to order medical examinations and tests only if medical records before him provide insufficient medical evidence to determine if claimant is disabled); and that the vocational expert’s testimony in response to the ALJ’s properly formulated hypothetical constituted substantial evidence, see Robson v. Astrue, 526 F.3d 389, 392 (8th Cir. 2008). 2 Accordingly, we affirm.