Dr. Walfrido Castelo graduated from the University of the Philippines College of Medicine. He did his internship at the Frankford Hospital and completed two residency programs, one at the University of Pennsylvania and the other at the University of Illinois College of Medicine. He is specialized in Radiology and board certified in Diagnostic Radiology. Dr. Castelo has been in practice for more than 20 years and is affiliated with the Kaiser Permanente South Bay Medical Center.