I am not familiar enough with Medicare/medigap so I'm no help to you. Have you contacted medicare? Or your doctor's office for help? Sometimes the social workers at the hospitals will help. It's a terribly expensive drug.
Marlene, wife to John DX w/SAA April 2002, Stable partial remission; Treated with High Dose Cytoxan, Johns Hopkins, June 2002. Final phlebotomy 11/2016. As of January 2017, FE is 233, HGB 11.7, WBC 5.1/ANC 4.0, Plts 146K.