Grand Lake Radiation Oncology provides radiation therapy to cancer patients. More than half of all cancer patients require treatment utilizing radiation therapy. Those treatments may include the use of advanced technology including:

  • Linear Accelerator Treatments
  • Intensity Modulated Radiation Therapy (IMRT)
  • Image-Guided Radiation Therapy (IGRT)
  • CT Simulation
  • Pinnacle - Computerized Treatment Planning


The addition of a new Varian Clinac iX Linear Accelerator allows for the most advanced cancer treatment treatment technology.  This $1.7 investment in the community allows patients to remain close to home while receiving radiation treatment.

Grand Lake Radiation Oncology's qualified staff includes Radiation Oncologists, Medical Physicists, Dosimetrists, a Radiation Oncology Nurse and Radiation Therapists. Together with our office staff and in-house Biller, these clinicians provide the knowledge and the personal care to provide a quality service to our patients. Our staff functions as a team, with each member contributing to the care of our patients, and most types of cancer can be treated at the Grand Lake Regional Cancer Center.

The Grand Lake Regional Cancer Center offers:

• Board Certified Physicians

• Dedicated Care Team

• Convenient and close parking

• Covered patient drop-off area at front door

• Comfortable surroundings

• Convenient office hours

• Patient Resource Library co-sponsored by The American Cancer Society

• American Cancer Society Patient Navigator services

• Staff Dietitian

• Support and Survivor services and education 

St. Rita's Outpatient Oncology and Oncology Specialists of St. Rita's are located in Suite D.  The Oncology Specialists of St. Rita’s provide specialized care for a wide variety of oncology and blood disorders.  We are the most experienced medical oncology and hematology practice in West Central Ohio.  Every family will be touched by cancer in their lifetime.  That’s why it is comforting to know that The Oncology Specialists of St. Rita’s brings together state-of-the-art medical technology with the expertise of prominent physicians and an exceptional staff.  Recognizing the impact that cancer has on lives of patients and their families, we focus on the specific needs of each individual. 

The Oncology Specialists of St. Rita’s also specialize in the treatment of blood diseases including anemia, coagulation disorders, white blood cell and platelet abnormalities and hypercoagulable states.

serving the community since 2004

June 15, 2015 - Celina, Ohio

Grand Lake Radiation Oncology welcomes

Dr. Dennis E. Ulewicz, M.D., to the cancer treatment team in Celina.  Dr. Ulewicz joins Dr. Sandra J. Herrington, PhD, M.D., at the Grand Lake Regional Cancer Center, providing radiation therapy to patients in the community.

A native of Detroit, Michigan, Dr. Ulewicz received his medical degree from Wayne State University School of Medicine, and has been in radiation oncology practice with over 25 years of experience.  

Dr. Ulewicz and his wife, Ann, will be relocating from Sharon, Pennsylvania, where he was previously in practice at the Sharon Regional Cancer Care Center.




radiation oncology

medical oncology