Proton Treatment Center Doctors

Ari Katerelos, M.D.

As Instructor of Radiation Oncology, Department of Radiation Medicine at LLUMC, Doctor Katerelos brings a unique perspective to patient care. His initial professional medical experience was in nursing, and he brings to his current practice a heightened patient-centered approach that a nursing background implies.

Doctor Katerelos began his nursing training at Glendale Community College, being awarded a diploma in vocational nursing. He subsequently earned an Associate degree in nursing from Pierce Community College. From 1992 to 2000 he served in several nursing roles in the United States Army and at Northridge Hospital, California, the latter in the medical oncology unit. He rose to the position of charge nurse at Northridge Hospital.

In 1998 Dr. Katerelos began his work toward a career as a physician. He graduated from California State University at Los Angeles with a Bachelor of Science degree (Magna Cum Laude) in 2000, and in 2005 received his M.D. degree from the University of California, Los Angeles. He completed his internship at UCLA Olive View Medical Center, and from 2006 to 2009 served his residency in radiation oncology at Loma Linda University Medical Center. During residency he gained extensive experience with proton and photon irradiation for multiple anatomic sites, including fractionated, intracavitary, and stereotactic irradiation.

Doctor Katerelos participates in a variety of investigations of proton and photon radiation therapy at LLUMC. He generally sees patients with cancer of the prostate, but has experience in the radiation treatment of cancers in a wide variety of anatomic sites.