July 24 (UPI) -- UnitedHealth Group said Thursday it is facing Department of Justice investigations over its Medicare billing practices.

UnitedHealth Group said in a statement on its website that it reached out to the DOJ after seeing media reports about investigations into its Medicare program.

"(UnitedHealth) has now begun complying with formal criminal and civil requests from the Department. The Company has full confidence in its practices and is committed to working cooperatively with the Department throughout this process," the statement said.

The insurer said it's launching its own investigation.

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