For additional information about ACOs, you can do the following:
Visit http://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/ACO/index.html
Visit http://www.medicare.gov/acos.html/
Speak with your doctor
Call 1-800-MEDICARE (1-800-633-4227) 24 hours a day/7days a week (TTY users should call 1-877-486-2048)