This study presents data on health care spending in South Korea in the three decades since 1977, the year its national health insurance--enacted in 1963--was enforced. National health insurance in South Korea is currently a single-payer program (that is both publicly and privately financed) that pays for privately provided health care. Universal coverage was achieved in 1989. As a result, the household share of total national health spending fell from 87.8 percent to 54.6 percent during the three decades, and the out-of-pocket share dropped from 87.2 percent to 38.0 percent. Although covered services have gradually expanded, benefits remain relatively low, and public funding is limited, leaving beneficiaries with relatively high copayments. Coupled with the fact that the government manages the schedule of fees paid to providers, the health care share of gross domestic product was a low 6.3 percent in 2007. An analysis such as this may be of particular interest in middle- or low-income countries contemplating expansions of coverage or undertaking insurance reforms.