Is there a way you can sanitize the prescriptions so it's evident that the prescription is real, but it hides who the doc is?
This is a tricky one, because you don't want the new Endo thinking you're stabbing shit haphazardly (they may decline to prescribe you things), but you can't risk the license of your friend if he's been a bit liberal in his prescriptions - that shit can get reported to the board and his license can get revoked if they deem it reckless.