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
  PHC412	CDC Lab
  PHC645	Commercial Laboratory
  PHC1317	Hospital Laboratory
  PHC1318	Other Clinical Laboratory
  PHC643	Public health laboratory (state or local)
  PHC1316	VPD Testing Laboratory

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

  Code	Display
  OTH	Other
  UNK	Unknown