On April 7, 2020, CMS proposed a new Families First Coronavirus Response Act. This act waives co-insurance and deductibles for additional COVID-19 related services. Under this act, CMS requires modifier CS applied to applicable institutional and non-institutional claim lines to identify that the service is subject to the cost-sharing waiver for COVID-19 testing-related services. This ensures that Medicare members are NOT charged any co-insurance or deductibles for those services as well.