This is a special time of year in health policy nerd world — the arrival of another year of data on National Health Expenditures (NHE) from the Centers for Medicare and Medicaid Services (CMS). The journal Health Affairs published a preview on Wednesday, which the authors summarized thusly: “National health expenditures are projected to grow at an average annual rate of 5.5 percent for 2018–27 and represent 19.4 percent of gross domestic product in 2027.