Medicare will pay for Procrit as long as it is given in a docs office and your HCT is 35 or lower ( might be 37 can’t recall exactly, but it is on the chart that accompanies the drug in your file, a yellow/orange page).
If you have a supplement it will probably pick up the portion medicare does not cover.
There is a charge for the injection, the CBC and the cost of the Procrit.
The Procrit is covered under Medicare Part B, so a supplement will usually pick up the uncovered balance, depending upon which supplement you have and the coverage. BCBS Senior Gold does cover it—in Minnesota.
Medicare Part D is not involved(as long as the injection is given in the docs office).