How to FAFSA a disabled parent for HPS loan?

Hi!! I'm a prepharm student who has an early decision application out for pharmacy school, and so I began looking into financial aid to pay for this costly beast of a degree. I found info on the Health Professional Student Loan, and I'd like to have that reserved for sort of an emergency back up, but it requires parent information on the FAFSA. My mother does not work and my father is on federal disability. I went back to school at 25, so I've never filled out their info on the FAFSA... How to FAFSA a disabled parent for HPS loan?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums