Items denied with a "co" modifier cannot be picked up, you should only pick up the chair if the denial begins with "
pr". (Difference being either contractual obligation or patient responsibility) The reason the commercials run with the "if Medicare doesn't pay, it's free" is because if Medicare denies the chair with a "co" denial the provider can't collect any funds from the patient and cannot pick up the chair.
Sounds like you need to get a billing consultant to review the recoup and see if you can't get paid by correcting the issues with the delivery ticket????