Wouldn't it be possible to add elements of this to a standard practice? Say, offer this type of contract to the uninsured only. You dont offer it to any patient that is on an insurance plan that you are PAR with. IN NYC there are alot of uninsured folk--from the wait-staff at all the eateries to people working at some of the companies in the garmet district. And a lot more.
If you start getting enough of these patients, you then start dropping your less lucrative insurance plans.