This is the ValueSet that contains all the codes in Types of diagnostic services performed by a laboratory (http://hl7.org/fhir/uv/order-catalog/ValueSet/laboratory-service-type) and Types of diagnostic services performed by a laboratory (http://hl7.org/fhir/uv/order-catalog/ValueSet/laboratory-service-type). E.g. what you have to deal with if you get resources containing codes in either of them