Can an x-ray taken of the leg show that there was a venous closure procedure (varicose veins) done 5 years ago? is it important to tell a doctor this?

Sonogram not X-RAY: A venous ultrasound to look at the saphenous veins would show if the saphenous vein has been closed. 5 years since the closure the vein would be threadlike or non existent. If the vein appeared normal, then it either wasn't treated by closure or the closure was unsuccessful.

Usually not: Unless it was surgical procedure with metal clips used there will be nothing on x-ray to show venous ablation. The laser fibers and rfa technology used today do not leave anything radio plaque behind. You should give your doctor your full medical history as possible.

No. : Only an ultrasound can tell.

NO: X ray will not show where a venous closure procedure was performed in the leg. An ultrasound might. It is always a good idea to share your prior medical history and procedures with your physician.