American Cancer Society Association / Organizations American Cancer Society Visit Website 5635 W 96th Street STE 100 Indianapolis, IN 46278-6025 (812) 376-6781 (812) 376-8031 (fax) Hours: Lower Eastern Indiana Area Service Center: M-F 8:30am - 5:00pm Cancer Information: 800-227-2345 About About We are the nationwide community-based voluntary health organization dedicated to eliminating cancer by prevention and saving lives through research, education, advocacy and local patient services.