Generally clinical psychologists, doctors, PA's, RN's etc do a small amount of Pro bono work (donated) to free or subsidized clinics. Major cities are generally good places to start.
Sliding scale means that you give what you can pay for treatment. I bet you can find some!
From each according to their ability, to each according to their need.
If facism decides to rear its ugly head in my area and time, then I'll surely be one of the first to go. A well educated, transsexual socialist. I'm screwed!