Coronary artery disease (CAD) continues as one of the major contributor to the rising mortality and mortaliy associated with atherosclerosis. Its identification, the assessment of its extent and severity are the most common indications for cardiac catheterization in adults. Studies among Caucasians have demonstrated that 30% of patients with CAD had an associated atherosclerotic renal artery stenosis (RAS) and 14% have significant stenosis. The authors began to routinely evaluate the renal arteries of the patients undergoing coronary angiography to determine the prevalence of RAS among Filipinos who have CAD. Methods: Prospective cross-sectional studies. Patients who undergo coronary angiography and satisfied the inclusion criteria were included in the study from January to July 2002. Results: A total of 119 patients were included. Sixty seven (56%) patients were diagnosed to have RAS in association with CAD while Fifty two (44%) presented without RAS. Out of the 67 patients with RAS, 12 patients (18%) had significant RAS.