Dr. Jacques Roy made the new plea in federal court in Dallas on Thursday. He's now charged in a federal indictment with multiple counts of conspiracy, obstructing justice, fraud and making false statements.
The counts accuse him of signing off on thousands of claims to bill the federal government for unnecessary or unfilled services.
In June, the Texas Medical Board said Roy had agreed to surrender his license to practice medicine in the state. The order says the 54-year-old Roy does not admit or deny the federal allegations against him, but agreed to a settlement to avoid a possible lawsuit.