4715 Arapahoe Ave. Boulder, Colorado 80303. Request an Appointment. Phone: 303-385-2000. Fax: 303-267-4419. Radiation Dept Phone: 303-385-2068. Radiation Dept Fax: 303-385-2090. New Patient Forms. Welcome to Rocky Mountain Cancer Centers in Boulder, located in the Tebo Family Medical Pavilion on the campus of Boulder Community Foothills Hospital..