93922 is an U/S study of the extremity arteries, single level, bilateral (EG, ankle/brachial indexes, doppler waveform analysis) ususlly looking for clots. This is also used for pt's with ulcers, pvd, varicose viens, secondary diabetic peripheral circulatory disorder. If your doc is planning on doing venous studies to code would different ie. 93970 dupplex venous leg bilat or 93971 uni. You need to find out what the study is for and what is being studied to apply the correct codes, 93922 is not a blanket code.