(June 1, 2016, 12:08 PM EDT) -- MEMPHIS, Tenn. — Health insurer Humana Inc. on May 17 asked a federal court to certify for interlocutory appeal the court’s denial of its motion to file an amended complaint against Medtronic Inc. for the alleged off-label marketing of Infuse bone graft (Humana Inc. v. Medtronic Sofamor Danek USA, Inc., et al., No. 14-2405, W.D. Tenn., Western Div.)....