A Huntersville physician has pleaded guilty to health care fraud and tax fraud, and has agreed to pay the largest settlement ever against a single doctor in the western part of North Carolina. The Justice Department says Mark Tuan Le, the former owner of Northcross Medical Center, took part in a scheme between 2009 and 2013 that billed Medicare, Medicaid, and private insurers for services that were not carried out or were not medically necessary. Le has agreed to pay the United States $6.2 million to settle those civil allegations. The Justice Department also says Le falsely claimed $2.4 million as business expenses for Northcross Medical Center, when in reality Le used that money to build an 8,000 square foot home on Lake Norman. In addition to the record settlement, Le could face roughly 10 years in prison and a $250,000 fine.