Being medical bills on a CR, I take it they are with a CA?
If so, then yes you need to try and get a pfd if they have not been payed. If they are with a CA and they are already paid then, you need to try a a dispute via the CRAs to see if they drop off (i.e CA no longer has the records) or if that doesn't work, try a GW letter (lay it on thick) to OC see if they will have the CA delete.