This value set includes codes based on the following rules:

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/umls version 20201217

  Code	Display
  C0872104	Assisted reproductive technology

• Include these codes as defined in urn:oid:2.16.840.1.114222.4.5.274 version 20201204

  Code	Display
  PHC1928	Dates

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20201211

  Code	Display
  16310003	Ultrasound
  5880005	Physical Exam

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

  Code	Display
  UNK	unknown