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Radiation Oncologists

Michele Lohr, MD

Dr. Lohr’s philosophy of care is to provide compassionate, quality care focusing on the unique needs of her patients and their families. She is committed to excellence in medicine by creating a culture of lifelong learning that integrates evidence-based practice, research and professional development as well as promoting an environment of respect, positive communication and collaboration among all members of the patient/family/health care team.

Dr. Lohr attended medical school at University of South Dakota Sanford School of Medicine, and then completed her internship with University of South Dakota. Dr. Lohr completed her residency at Mayo Graduate School of Medical Education in Rochester, Minn. and is board certified by the American Board of Radiation Oncology.

She is an expert in 3D-conformal radiation therapy, intensity modulated radiation therapy, image-guided radiation therapy, stereotactic radiosurgery (functional and therapeutic), stereotactic body radiotherapy, high dose brachytherapy, low dose brachytherapy and interstitial brachytherapy. She has a special interest in the treatment of head and neck cancers, gynecologic and breast, and pediatric radiation oncology.

Dr. Lohr has two children and in her spare time, she enjoys biking, skiing, traveling and cooking.


Steve McGraw, MD

Dr. McGraw believes modern cancer care is truly a partnership that involves a multidisciplinary team approach so each patient receives a personalized treatment plan. He believes being a good partner with the patient and the physicians is the most rewarding aspect of his career as a radiation oncologist.

Dr. McGraw attended medical school at University of South Dakota Sanford School of Medicine, and then finished his internship with University of South Dakota. Dr. McGraw completed his residency in radiation oncology at University of Arizona and is board certified with the American Board of Radiology – Radiation Oncology.

He is an expert in 3D conformal radiation therapy, intensity-modulated radiation therapy, image-guided radiation, stereotactic radiosurgery (functional and therapeutic), stereotactic body radiotherapy, high dose brachytherapy, low dose brachytherapy, pediatric radiation oncology, multidisciplinary and personalized cancer care.

Dr. McGraw has three children and in his spare time, he enjoys hunting and restoring old muscle cars.


Ryan Nowak, MD

Given the progressive complexity of cancer therapy, Dr. Nowak believes patients are best served by a multidisciplinary, team-based approach. In his practice, Dr. Nowak strives to provide patients with the most current, evidence-based cancer treatment, while offering patients access to treatment with cutting-edge radiation technology and techniques.

Dr. Nowak received his medical degree from University of Colorado – Denver School of Medicine and completed his residency in radiation oncology at University of Nebraska Medical Center in Omaha, Neb.

He is an expert in 3D-conformal radiation therapy, intensity-modulated radiation therapy, frameless and frame-based stereotactic radiosurgery, image-guided radiation therapy, adaptive radiation therapy, total body irradiation, craniospinal irradiation, accelerated partial breast irradiation, high dose-rate brachytherapy, and low dose-rate brachytherapy. He has a special interest in the treatment of tumors of the central nervous system, head and neck, prostate and lung.

Dr. Nowak is married and has one son. In his spare time, he enjoys following college football, traveling, and spending time with his family.