See that pie chart? Take firearms out of it and it will STILL be 100%. More than that, the total number of suicides will not drop. Serious studies show that removing firearms from the equation does not result in a reduction of suicides. People who want to die, die. The fact that 50% of suicides happen without a firearm should tell you that.
The FBI should NOT get medical information until AFTER a crime has been committed and then only with a warrant. Without a crime, there is no probable cause that can possibly withstand scrutiny.