Also, possibly of interest is
this PDF that goes over some of the considerations that go into determining the amount of reimbursement that can be collected for preparing and transporting a donated organ. It goes over things like the cost of maintaining the space necessary for preparing the organs for transport, keeping track of staff hours devoted to the task, physician fee schedules, equipment depreciation and such. It is all stuff that has to be documented and there are stiff fines for attempting to collect more than is actually due. One cannot simply charge whatever the market will bear.
If PP was negotiating for higher payments, I wonder if they were being payed less than what they could justify collecting, in effect bearing part of the cost themselves in order to provide this service, and wanted to correct this if possible. I'm not sure how to find out the answer to this question.
(I Found it interesting that a physician can collect up to $1250 for a cardiac excision.)