There continues to be a lot of debate/discussion on the appropriate ways to utilize the Q6 modifier. There is very good information in the practice forum that should help practice considering the use of the Q6 modifier but we also wanted to provide you with the CMS documentation. Nearly everyone at some time or another can benefit from using the Q6 modifier but its misuse can cause serious issues.
Here is the CMS documentation indicating how to properly use the Q6 modifier.
Pages 5-6 Covers the Time Frame Allowable for Billing with Q6 Modifier