Intersection of http://hl7.org/fhir/ValueSet/observation-codes and http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.113883.10.20.15.2.5.6
This is the ValueSet that contains codes in both LOINC Codes (http://hl7.org/fhir/ValueSet/observation-codes) and Location Relevance (eCR) (http://phinvads.cdc.gov/fhir/ValueSet/2.16.840.1.113883.10.20.15.2.5.6).