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 e70a1b22-6472-4aa3-ab67-3058f5afdb56-21
This code system http://hl7.org/fhir/comparison/CodeSystem/e70a1b22-6472-4aa3-ab67-3058f5afdb56-21 defines codes, but no codes are represented here