Dr. Grabb attended Arizona Health Sciences Center in Tucson, Arizona, where he received his medical degree. He completed his diagnostic radiology residency at Mt. Sinai Hospital in New York City and then a National Institute of Health Fellowship in cardiovascular and interventional radiology at Stanford University. Dr. Grabb was awarded a Certificate of Added Qualification in cardiovascular and interventional radiology and is board certified in diagnostic radiology. He has been a staff radiologist at Torrance Memorial Medical Center since 1987.
In addition to general radiology, he specializes in cardiac radiology and the interpretation of PET scans. Dr. Grabb also has a strong interest in the use of information systems within radiology departments and healthcare. He is a member of the Radiological Society of North America, American College of Radiology, the Los Angeles Radiological Society, the California Radiological Society and the Society for Imaging Informatics in Medicine.