Kaiser Permanente

Kaiser Permanente leads with an integrated care model that pairs its $100B revenue with 12.7M members. As a not-for-profit system operating both insurance and hospitals, it outperforms #10 Oscar Health in preventive care, boasting 95% of members completing annual wellness visits—30% higher than the average insurer. Active in 8 states plus DC, its unique delivery model yields 20% fewer hospital readmissions than typical rivals.