This value set includes codes based on the following rules:

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v2-0227 version 20200717

  Code	Display
  CON	Connaught
  LED	Lederle

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

  Code	Display
  PHC1103	Massachusetts Health Department
  PHC1104	Michigan Health Department

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

  Code	Display
  OTH	other
  UNK	unknown