This value set includes codes based on the following rules:

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

  Code	Display
  PHC904	Acute/Convalescent IgG Difference Test
  PHC910	Mumps IgG EIA (Acute)
  PHC911	Mumps IgG EIA (Convalescent)
  PHC909	Mumps IgM EIA

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

  Code	Display
  444077007	RT-PCR
  30662005	Immunofluorescent Antibody Assays
  12717000	Virus Isolation

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

  Code	Display
  OTH	Other