An Accountable Care Organization (ACOs) is formed by a group of doctors, hospital and other health care providers, who come together to provide high quality care to their Medicare patients.

According to the Centers for Medicare and Medicaid Services (CMS), the goal of coordinated care is to ensure that patients, especially the chronically ill, get the right care at the right time, while avoiding unnecessary duplication of services and preventing medical errors.

For health care providers, participating in an ACO is purely voluntary.

Read more about Accountable Care Organizations:

Physicians gravitate toward accountable care organizations – Washington Post