[영문]This paper presents a framework for universal health insurance that builds on the current U.S. mixed private-public system by expanding group coverage through private markets and publicly sponsored insurance. This Building Blocks approach includes a new national insurance qqqquot;connectorqqqquot; that offers small businesses and individuals a structured choice of a Medicare-like public option and private plans. Other features include an individual mandate, required employer contributions, Medicaid/State Children’s Health Insurance Program (SCHIP) expansion, and tax credits to assure affordability. The paper estimates coverage and costs, and assesses the approach. Our findings indicate that the framework could reach near-universal coverage with little net increase in national health spending