This is the CodeSystem that contains all the codes in US Public Health CodeSystem - Report Initiation Type Codes (http://hl7.org/fhir/us/ph-library/CodeSystem/us-ph-codesystem-report-initiation-types) and US Public Health CodeSystem - Report Initiation Types (http://hl7.org/fhir/us/ph-library/CodeSystem/us-ph-codesystem-report-initiation-types). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem b2445509-e923-4866-94cd-833e1378d96b-20
This code system http://hl7.org/fhir/comparison/CodeSystem/b2445509-e923-4866-94cd-833e1378d96b-20 defines codes, but no codes are represented here