This is the ValueSet that contains codes in both LOINC Codes for Digoxin Concentration (http://hl7.org/fhir/uv/pddi/ValueSet/valueset-digoxin-LOINC) and LOINC Codes for Digoxin Concentration (http://hl7.org/fhir/uv/pddi/ValueSet/valueset-digoxin-LOINC).