Ask Dr. Z

We have a physician who insists that if an angiogram is performed and there is runoff into a vessel and if he performs angiogram in one of the vessels that the runoff was in that he has completed his basic examination. The only problem is that he is never consistent when using 75774. Can you please explain what would qualify as a basic examination and how it would be appropriate then to bill for an additional angiogram with 75774? I should also say that 95% of the time he states that there are no prior angiograms because he factors this in also when he wants to bill for 75774.