ASPVD

“My practice involves a lot of routine foot care and I am looking for clarification. In using Q8 and Q9 modifiers, do you need to have atherosclerotic peripheral vascular disease (ASPVD) as a diagnosis? If so what’s the code to be used for general ASPVD? Modifier Q7 indicates that there has been an amputation. It is not necessary to have an ASPVD diagnosis in that scenario?”