"Better coordinated care is good for patients and it saves money," HHS Secretary Kathleen Sebelius said in a statement.
"We applaud every one of these doctors, hospitals, health centers and others for working together to ensure millions of people with Medicare get better, more patient-centered, coordinated care."
A total of 154 organizations participate in shared savings initiatives under Medicare, according to materials from HHS.
These groups serve 2.4 million of the program's beneficiaries, HHS stated.
The model is seen as a way to encourage more patient-centered care at lower costs.