I don't believe it's been extended to mental health records at the federal level yet. Larry Craig and Schumer proposed it not long ago. That's a can of worms you don't want to open without the utmost care. There's the privacy issue. Denying rights to psychotic schizophrenics is one thing. But what if there's a history of depression or drug abuse in the past? What about personality disorders and which ones. What if there was a misdiagnosis, and what really happened was an adverse drug reaction. IIRC, the debate in at least one state involved denying concealed carry for a DUI.