This is the ValueSet that contains codes in both Advance Directives Content Type (http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1099.57) and Advance Healthcare Directive Document Types Grouper (http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1115.41).