It is beyond the scope of an IG to declare what is considered fair use and there is not consensus to declare that this information must be included. However, FHIR does require that the coding.display be a valid value from the code system and guidance will be added to the guide stating that and providing some consideration that may lead to implementers adding display or text valuesas defined in the resolution in   FHIR-31069 . Summarized for this ticket: Add guidance in general guidance section (under CapabilityStatement Server Requirement) called "Payer Considerations for App Rendering" Many of the codes used in this guide are proprietary with  [licensing requirements] (Terminology.html). While it is recommended that consumer apps acquire the necessary licenses to show descriptions for these codes, not all app developers may be in a position to do so. Because of this, payers  MAY  choose to provide a concept text ` [CodeableConcept] .text` or the coding display ` [CodeableConcept] .coding.display. It is the responsibility of the payer to make sure that the descriptions provided are correct.   If the 'display' element is populated, the string used in ` display `  SHALL  be one of the display strings defined for that code by the code system (code systems may define multiple display strings for a single code). With the additional statement noting that  "If the code description available is not known to be an exact match of a display string defined by the code system, the  ` [CodeableConcept] .text` should be used in place of the ` [CodeableConcept] .coding.display`."