For us, compassion is key. We treat cancer patients as whole individuals, taking into account their lifestyle, family and community. At the same time, Oncology Associates is at the forefront of cancer treatment: every one of our oncologists is involved in research and community service. We provide our patients access to the latest in technology, therapies and techniques. Our state-of-the-art oncology care and personalized patient plans truly make our Omaha practice a center of excellence throughout Nebraska. Learn more about our cancer doctors and our amazing oncology nurses and staff.

Our Oncology Doctors

Irina E. Popa, MD
Irina E. Popa, MD
Dr. Irina Popa traveled to the United States to advance her medical career after finishing medical school in Romania. She says she wanted to “live and work in a democratic society full of opportunity.” Here at Oncology Associates she’s found ample opportunity to not only help her patients on a day-to-day basis, but to continue to learn about the new research and treatment challenges in hematology and oncology.
Tim Dorius, MD
Tim Dorius, MD
Dr. Dorius received his medical degree from the University of Oklahoma. He completed his internal medicine residency and hematology/oncology fellowship at the University of Nebraska Medical Center, serving as Chief Fellow during his final year of fellowship. He is board certified in medical oncology, hematology, and internal medicine. He is a member of the American Society of Clinical Oncology, American Society of Hematology, Nebraska Medical Association, Nebraska Oncology Society, and the Metro Omaha Medical Society. Dr. Dorius lives in Omaha with his wife and their six children.
James Schwarz, MD.
James Schwarz, MD.
Our new physician James Schwarz, MD.

More About Oncology Associates

Meet Our Team!

The Oncologists and Staff at Oncology Associates are dedicated to one goal: Providing the highest quality care for our patients throughout Omaha and Nebraska.

Our Oncology Doctors

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Our  PAs and APRNs

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Our Clinical Care Team

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Our Support Staff

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Oncology Associates

Provides world class cancer care to patients in Omaha and throughout Nebraska, with clinics in Blair and Norfolk.

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