Indonesia has made steady and significant progress on several key population health outcomes over the past few decades. This policy brief assesses Indonesia's progress towards attaining universal health coverage (UHC) across the three different dimensions of breadth, depth, and height by studying the implementation of Jamkesmas, the government-financed health insurance program for the poor and near-poor and currently the largest social health insurance program in the country. As Indonesia transitions towards a merger of most of its existing social health insurance programs under a single-payer administrative umbrella in 2014, the policy brief highlights key lessons from the implementation of Jamkesmas that can help inform reforms aimed at attaining UHC in the country by 2019.