Seems like U.S. healthcare spending is 17.5%-19.5% of its GDP: "Overall, health spending was 17.6% of GDP in 2023, similar to pre-pandemic shares (17.5% in 2019) after an uptick in 2020 (19.5%) and 2021 (18.3%)." (https://www.ama-assn.org/about/ama-research/trends-health-ca...)