Mercy Radiation Oncology - Jefferson

1350 Highway 61 South
Festus, MO 63028
Fax: (636) 931-4818
Services are provided by Mercy Hospital Jefferson Learn more »
Hours of Operation:
Monday-Friday: 7:30 a.m. - 4 p.m.
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Partnering closely with your medical oncologist and referring physician, the radiation oncology team at Mercy Cancer Center – Jefferson works to determine the best, and most effective, treatment for your specific cancer diagnosis. Your team of specialized doctors remains focused and dedicated to working with you on overcoming this disease, returning you to normalcy.

Using the latest technology and research, Mercy’s radiation oncology team is composed of highly trained physicians and nurses. The knowledge and understanding that comes with years of experience promotes efficient care management and careful monitoring of your condition.

How Does Radiation Work?

  • Highly targeted radiation kills tumors.
  • Maximum radiation is focused directly on the tumor, shifting impact away from healthy tissues and organs and discouraging side effects.
  • Radiation may be used with other innovative treatments, like chemotherapy, hormone therapy and immunotherapy, to fight against the growth of new cancer cells.

Our Providers

Timothy R. O'Leary, MD, Mercy
Radiation Oncology