Provider-Sponsored Issuers, Medical Loss Ratios, and Quality Ratings in ACA Marketplaces

Introduction The Affordable Care Act’s medical loss ratio (MLR) regulation requires individual market insurers to spend at least 80% of premium revenue on medical care and quality improvement, but evidence is limited on whether MLRs correspond to measured quality and how this differs by insurer organizational structure. Methods Using CMS MLR financial reports for ACA marketplace issuers (2015-2023) linked to Quality Rating System ratings (2020-2023), we compared provider-sponsored issuers owned by or operating as part of integrated delivery systems, with traditional issuers on MLRs, spending components, and quality, using adjusted regressions. Results Among 2,751 issuer-state-years, 581 (21.1%) were provider-sponsored. Provider-sponsored issuers had MLRs 5.8 percentage points higher than traditional issuers (95% CI, 2.0 to 9.7). Provider-sponsored issuers had higher overall quality ratings (0.65 stars; 95% CI, 0.36 to 0.94), despite reporting $5.5 lower quality-improvement expenses per member per month (95% CI, −8.9 to −2.2). A 10-percentage-point higher MLR was associated with 0.15 higher stars (95% CI, 0.09 to 0.21). Prior-year, but not current-year, quality-improvement expenses were associated with higher subsequent ratings (0.04 stars per $10 per member per month; 95% CI, 0.02 to 0.07). Conclusion Organizational structure may shape MLR interpretation; direct quality measures may complement MLR regulation.