you could see if you could get involved in a clinical trial for something. i was in one 2 years ago and had 2 colonoscopies in a year that were not charged to my insurance, they were charged, to the study, I also got all meds free during the study and they paid me $200 as a stipend for being in the study.
My GI drs office has a research dept and they carry out clinical trials out of the hospital of the university of penn
may be worth looking into for you