Location details Physician Practice Radiation Oncology - Callen Blvd. - Suite 130 300 Callen Blvd. Suite 130 Summerville, SC 29486 854-529-3260 Get Directions Parking Ample free parking available. Specialties Cancer care Our expert team coordinates comprehensive cancer care, from diagnosis through treatment. Head & neck cancer Comprehensive care for head and neck cancers, including nose, mouth and throat cancer.