Intersection of http://hl7.org/fhir/ValueSet/observation-category and http://hl7.org/fhir/us/core/ValueSet/us-core-simple-observation-category
This is the ValueSet that contains codes in both Observation Category Codes (http://hl7.org/fhir/ValueSet/observation-category) and US Core Simple Observation Category (http://hl7.org/fhir/us/core/ValueSet/us-core-simple-observation-category).