The challenges for the US health care system of high health care costs and poor health outcomes in individuals with multiple (2 or more) concurrent, chronic conditions have been well documented.^1,2 Estimates are that more than one-quarter of all adults have multiple chronic conditions³; in addition, more than two-thirds of Medicare fee-for-service beneficiaries have multiple chronic conditions, with 14% having 6 or more common conditions.⁴ Recently, the Centers for Medicare & Medicaid Services (CMS) released new data resources on chronic conditions among Medicare fee-for-service beneficiaries to better define the burden of chronic conditions among beneficiaries and the implications for the US health care system.