Hospital Information: Outpatient Cost to Charge Ratio - History JFK JOHNSON REHAB INSTITUTE Click here to download this table. Ratio Effective Date 032.12% 5/15/2024 035.33% 1/1/2024 033.94% 2/1/2023 025.41% 1/1/2023 024.41% 1/1/2022 028.25% 9/1/2021 028.62% 7/1/2021