We have a family physician who has been out of work on sick leave since the middle of November, we use one of those rent-a-doc companies for fill in. Initially all claims were billed with the Q6 modifier, but I was under the impression that you could only bill this way for 60 days. I was just told today that that is not true and I can continue to use the Q6 modifier to bill for this. Can someone help me with this please.