I argue that Accountable Care Organizations (ACOs) do not represent a health care delivery revolution, but an evolution. Based on my experience in LTC and what I’ve been reading on the Internet, ACOs appear to be an evolutionary variant of the species known as HMOs. Regardless, ACOs represent a significant change to health care delivery. The ACO model will have a sweeping impact on how health care is planned for, delivered, documented, reported, and paid for. It follows that for an ACO to work, information technology serves as the glue that holds it together; those providers who have successfully worked with HMOs can attest to the critical role IT plays. Participation as ACO members will require providers to carefully evaluate what such participation will have on their respective IT systems.