On September 11, CMS updated their FAQs related to guidance on billing for COVID-19 related services. This newest update includes eight new FAQs in the National Coverage Determinations section on topics such as flexibilities related to face-to-face requirements or direct supervision as applicable to non-COVID-19 patients.
The FAQs can be found at https://www.cms.gov/files/document/03092020-covid-19-faqs-508.pdf
CMS continues to update this document on a regular basis and should be reviewed frequently for new information.