Those figures are in the right range, and the full picture is larger. The CMS NHE 2023 data puts total US healthcare administration at roughly $1.1-1.7T annually (depending on methodology), building on Woolhandler and Himmelstein's 2020 Annals paper ($812B in 2017 dollars). The per-capita comparison against 10 OECD peers: US $4,983 vs. a peer average of $884. That 5.6x gap is the number Issue #5 of this series will examine in detail, covering three separate computation methodologies and why the estimates range so widely. All source code will be in the repo: https://github.com/rexrodeo/american-healthcare-conundrum

The policy lever that addresses this is billing standardization, not just insurer reform. Countries like Germany and Switzerland run much lower admin under private insurance through standardized claims formats and all-payer rate setting.