Union of http://terminology.hl7.org/CodeSystem/v3-PeriodicIntervalOfTimeAbbreviation and http://terminology.hl7.org/CodeSystem/v3-PeriodicIntervalOfTimeAbbreviation

This is the CodeSystem that contains all the codes in PeriodicIntervalOfTimeAbbreviation (http://terminology.hl7.org/CodeSystem/v3-PeriodicIntervalOfTimeAbbreviation) and PeriodicIntervalOfTimeAbbreviation (http://terminology.hl7.org/CodeSystem/v3-PeriodicIntervalOfTimeAbbreviation). E.g. what you have to deal with if you get resources containing codes in either of them

CodeSystem

Generated Narrative: CodeSystem 9137e97b-aec1-4316-a65f-a273ef42c951-3296

This code system http://hl7.org/fhir/comparison/CodeSystem/9137e97b-aec1-4316-a65f-a273ef42c951-3296 defines codes, but no codes are represented here

Code