Working from LogicaHealth IG

https://covid-19-ig.logicahealth.org/StructureDefinition-COVID-19-General-Comorbidites-Absent.html

See analysis spreadsheet by Linda Bird

FHIR elementBindingComments
Condition.codeCOVID19 Genreal Comorbidity Value Set


Condition.modifierExtension:certaintyOfAbsence

CertaintyOfAbsenceVS