Hospital Information: Outpatient Cost to Charge Ratio - History MATHENY SCHOOL Click here to download this table. Ratio Effective Date 094.20% 1/1/2023 094.20% 1/1/2022 094.20% 1/1/2020 094.20% 1/1/2019 094.20% 1/1/2018 094.20% 1/1/2017 094.20% 1/1/2016 094.20% 1/1/2015 094.20% 1/1/2014