As a result of the ongoing COVID-19 public health emergency, the Centers for Disease Control and Prevention’s National Center for Health Statistics (CDC/NCHS) has implemented an additional code: U09.9 - post COVID-19 condition, unspecified.
This code became effective October 1, 2021 to identify conditions following acute COVID-19. It's a secondary
diagnosis code added after the specific condition related to COVID-19 is known, such as chronic respiratory failure, loss of smell, loss of taste, multisystem inflammatory syndrome, pulmonary embolism, pulmonary fibrosis etc. This code is not used
in cases that are still presenting with active COVID-19 but it is used in conjunction with conditions which are the consequence of COVID-19.
ICD-10-CM coding guidance can be found at https://www.cdc.gov/nchs/icd/icd10cm.htm.