Contact Us Newport Doctors Medical Imaging 401 Old Newport Blvd. Suite 201 Newport Beach, CA 92663 Phone 949.999.2950 Fax 949.999.2960 Hours of Operation Monday - Friday 8 a.m. - 5 p.m. After Hours For urgent issues only, please call 949.999.2950. Our Staff Neurology Division Dale V.  Di Stefano, M.D. David A. Gehret, M.D. Oncology Division Khosrow Mahdavi, M.D. Michael J. Schlutz, M.D. Radiology and Nuclear Medicine Newport Harbor Radiology Associates