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
  PHC384	airport (departure gate)
  PHC382	CDC traveler's hotline
  PHC385	private physician
  PHC383	travel agency

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v2-0063 version 20170801

  Code	Display
  FND	friends

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/umls version 20200813

  Code	Display
  C0027989	newspaper
  C1514958	health department
  C1552813	pre-travel clinic

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

  Code	Display
  OTH	other (specify)