Dr. Hemanth Rao, a Charlotte neurologist, has agreed to pay more than $2 million to the federal government to settle civil fraud allegations in connection with administration of intravenous therapy. Rao is owner of the Neurological Institute in Charlotte, formerly known as Neurological Consultants of the Carolinas. The group has four offices, in Charlotte and Monroe. The settlement was reached following a multiyear investigation by the U.S. Department of Health and Human Services. Investigators found that, from Oct. 13, 2003, to May 26, 2006, Rao failed to meet Medicare regulations requiring physician supervision of intravenous immunoglobulin therapy, according to a statement from Anne Tompkins, U.S. attorney for the Western District of North Carolina.