This value set includes codes based on the following rules:

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v2-0532 version HL7 v2.5

  Code	Display
  N	no

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

  Code	Display
  PHC396	yes, had a pre-existing wound
  PHC395	yes, sustained a wound
  PHC397	yes, uncertain if wound new or old

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

  Code	Display
  UNK	unknown