Using ICD-[X] Codes with FHIR mentions the following: "The next revision, ICD-11, is scheduled for release in 2017. "

This should be changed to something like:
"The new version of the ICD (ICD-11) was released on June 18, 2018, as a preliminary version. It was officially presented at the World Health Assembly in May 2019 and will be used as the official reporting system by member states beginning January 1, 2022."