This value set includes codes based on the following rules:

 <status value="active"/> <date value="2010-03-16"/> <description value="Observation values used to indicate a knowledge subject of interest for which knowledge content is requested (e.g., a medication, a laboratory test, a medical condition)."/> <compose> <include> <system value="http://snomed.info/sct"/> </include> <include> <system value="https://www.nlm.nih.gov/mesh"/> </include> <include> <system value="http://terminology.hl7.org/CodeSystem/icd9cm"/> </include> <include> <system value="http://terminology.hl7.org/CodeSystem/icd10"/> </include> <include> <system value="http://www.nlm.nih.gov/research/umls/rxnorm"/> </include> <include> <system value="http://hl7.org/fhir/sid/ndc"/> </include> <include> <system value="http://loinc.org"/> </include> </compose> </ValueSet>