I am having trouble getting this 11720 paid. My doctor is a family practitioner and does this procedure quite often. I just recently realized this can be paid if I use the Q7, Q8 or Q9 modifier if appropriate. When I look at these modifiers in HCPCS they are "class A, B and C findings" and I do not know what that means... is there anyone out there that can help me? Or at least point me in the direction of finding my answer ~ I have no idea where to look. Thanks.