This is the CodeSystem that contains all the codes in Modifier type Codes (http://terminology.hl7.org/CodeSystem/modifiers) and Modifier type Codes (http://terminology.hl7.org/CodeSystem/modifiers). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 209ef897-e0c1-42aa-924c-4a2591583ab9-704
This code system http://hl7.org/fhir/comparison/CodeSystem/209ef897-e0c1-42aa-924c-4a2591583ab9-704 defines codes, but no codes are represented here