A Las Vegas radiology firm and its principals are agreeing to pay $2 million to resolve allegations that they submitted false or fraudulent federal Medicare claims.

The Department of Health and Human Services inspector general on Wednesday called the March 13 settlement with West Valley Imaging and doctors William Boren and Luke Cesaretti one of the largest ever reached.

Inspector General Daniel Levinson alleged Boren and Cesaretti and their firm improperly billed for diagnostic tests to Medicare beneficiaries and failed to provide required treating doctors' orders.

Levinson says the case was resolved with the financial penalty and a 5-year "integrity agreement."

The settlement included no finding of guilt, and the doctors did not admit wrongdoing.