My facility has an electromyographer (EMG tech) come to our office twice a week to perform EMGs. We have been billing the EMGs under the referring doctor. Most of the time that referring doctor is in the buildling at the time that the EMG is performed and this is billed as incident-to. However, sometimes the doctor is not in the office at the time of the EMG. My question is, can we still bill under the referring doctor if he is out of the building or do we have to bill under a doctor who is in the office on that day?

Thank you