evidence: The COVID-19 public health emergency (PHE) ended at the end of the day on May 11, 2023. View Infectious diseases for a list of waivers and flexibilities that were in place during the PHE. [...] After the FDA issues an emergency use authorization (EUA) or approves licensure of each COVID-19 vaccine product, CMS will identify the following for Medicare payment: [...] Together, these codes describe the administration of the COVID-19 vaccines and the monoclonal antibody products, as they become available. CMS and the AMA developed this code structure to make claims processing for administration of COVID-19 vaccines and monoclonal antibody infusions that get FDA EUA or FDA approval more efficient. Many of these codes may be placeholders and wouldn’t be effective until an authorized product is specifically assigned. It's possible that we won't use all codes. We'll issue specific code descriptors in the future as needed. Medicare effective dates for the codes will match with the date of the FDA EUA or FDA approval.