This is the CodeSystem that contains codes in both US Public Health Usage Context Type (http://hl7.org/fhir/us/ecr/CodeSystem/us-ph-usage-context-type) and US Public Health Usage Context Type (http://hl7.org/fhir/us/ecr/CodeSystem/us-ph-usage-context-type).
Generated Narrative: CodeSystem 167925c0-8f88-47e0-ab1a-87ad0986b1dc-18
This code system http://hl7.org/fhir/comparison/CodeSystem/167925c0-8f88-47e0-ab1a-87ad0986b1dc-18 defines codes, but no codes are represented here