Grey's Anatomy Universe Wiki
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Dr. Mason is a cardiothoracic surgeon at St. Ambrose Hospital.
Dr. Mason was called in to take over operating on Troy Hagen so that Sam Bennett could step out. Before he went in, he applauded Sam for operating on the guy who hit Maya, tipping him off that Pete had lied to him.
He is a cardiothoracic surgeon at St. Ambrose Hospital.