If you are interested in how CMS resolved, or not, the interaction between the ACO program and the agency's recently finalized CJR (Comprehensive Care for Joint Replacement) demonstration the trade publication, Accountable Care News recently published my essay, "Missed Opportunity: CMS Fails to Address the Interaction Between the CRJ Demo and the ACO Program." This is a truly in-the-weeds issue since both the ACO program and CJR demo operate under very complicated and detailed regulations amounting to well over 500 Federal Register pages.