This value set includes codes based on the following rules:

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20200901

  Code	Display
  260373001	Detected
  75540009	Elevated
  82334004	Indeterminate
  260385009	Negative
  131194007	Non-Reactive
  260415000	Not detected
  10828004	Positive
  11214006	Reactive
  373121007	Test not done
  117006002	Weakly-reactive

• Include these codes as defined in urn:oid:2.16.840.1.114222.4.5.274 version 20200526

  Code	Display
  PHC2244	Not Elevated

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 20090501

  Code	Display
  UNK	unknown