Special to the Advance McALLEN — A physician and employee have been charged for their roles in a health care fraud scheme involving the submission of more than $3.5 million in claims to Medicare, announced U.S. Attorney Jennifer B. Lowery.Authorities took Dr. Osama Balhir Nahas, 67, McAllen, and Isabel Moreno Pruneda, 50, Edinburg, into custody today. They are expected to make their initial appearance before U.S. Magistrate Judge Juan F. Alanis Aug. 22 at 9 a.m.A federal grand jury returned the 15-count indictment Aug. 16. It alleges Nahas is a physician and owner, while Pruneda was an employee at Crosspoint ...