This code system http://terminology.hl7.org/CodeSystem/opinions defines many codes, but they are not represented here

<status value="active"/> <experimental value="false"/> <date value="2021-07-27T00:00:00-04:00"/> <publisher value="TBD - External Body"/> <contact> <name value="Atlantic Pharmaceutical Services Inc."/> </contact> <description value="Codes to identify products and services that do not have DIN's and which need to be billed. http://www.atlanticpharmaceutical.ca/default.asp?mn=5.23"/> <caseSensitive value="true"/> <content value="not-present"/> </CodeSystem>