If you’re still confused about how to correctly utilize modifier CS (Cost-sharing waived for specified covid-19 testing-related services that result in and order for or administration of a covid-19 test …), you’re not alone. In fact, one Medicare Administrative Contractor (MAC) recently issued fresh guidance on the proper way to use the code.
Remember: Starting on March 18, 2020, the Families First Coronavirus Response Act (FFCRA) mandated that Part B practices append modifier CS to any E/M service resulting in the provider either administering or ordering a COVID-19 lab test for the patient for the duration...
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