This is the CodeSystem that contains codes in both US Public Health CodeSystem - Usage Context (http://hl7.org/fhir/us/ph-library/CodeSystem/us-ph-codesystem-usage-context) and US Public Health CodeSystem - Usage Context (http://hl7.org/fhir/us/ph-library/CodeSystem/us-ph-codesystem-usage-context).
Generated Narrative: CodeSystem 52ca7194-343c-4909-957a-337291b688fc-21
This code system http://hl7.org/fhir/comparison/CodeSystem/52ca7194-343c-4909-957a-337291b688fc-21 defines codes, but no codes are represented here