This is the CodeSystem that contains all the codes in ObservationreferenceRangeNormalValue (http://terminology.hl7.org/CodeSystem/observation-referencerange-normalvalue) and ObservationreferenceRangeNormalValue (http://terminology.hl7.org/CodeSystem/observation-referencerange-normalvalue). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem f90bd0a2-fe48-4d1e-ba12-6375efeecd69-707
This code system http://hl7.org/fhir/comparison/CodeSystem/f90bd0a2-fe48-4d1e-ba12-6375efeecd69-707 defines codes, but no codes are represented here
| Code | Display | Definition |
| negative | Negative | The expected normal value for the observation is negative. |
| absent | Absent | The expected normal value for the observation is absent. |