How common is it for somebody to get renal artery occlusion?

Not so common: Depends on your age, BP level- less than 1% of patients with moderate or gr 2 ( BP more than 160/100) high blood pressure will have renal artery stenosis or blockage. More common in caucasians than african americans.Usually don't have to screen for ras unless patient is on multiple medications , unable to tolerate medicines, severe high BP requiring hospitalization or kidney function is affected.

Depends on age, etc.: Renal artery stenosis (ras) typically occurs when there is generalized vascular disease from "hardening of the arteries" or less commonly in fibromuscular dysplasia. It's usually associated with BP that's accelerated or difficult to control, and may lead to decline in kidney function or sudden pulmonary edema. Definitive diagnosis is with arteriography & some cases can be treated or reversed.