Do you have a Medicare Supplement policy? If not, there is a 20% copay for Medicare Part B (doc visits, chemo etc). If you do have a supplement then depending upon whether or not your supplement has a deductible and how much, the 20% may be covered. In my case, Medicare + Supplement picks up all charges.
diag. Stage IV, 5/05, liver met
lap sigmoid colectomy, 6/05
6 cycles Xeloda/oxaliplatin/Avastin (NED after 2)
11/08 9x13mm right lower lobe lung nodule; removed via VATS 4/09
6 cycles Xeloda + Avastin
Avastin only 10/09-5/11
Still NED 06/18