This value set includes codes based on the following rules:

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20210322

  Code	Display
  225728007	Emergency department
  22232009	Hospital/inpatient setting
  440655000	Outpatient setting
  25179006	Blood donation

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/umls version 20210608

  Code	Display
  C0442681	Correctional facility (jail, prison, detention center, etc.)
  C0681146	Homeless shelter

• Include these codes as defined in urn:oid:2.16.840.1.114222.4.5.274 version 20211027

  Code	Display
  PHC256	Substance use disorder treatment center
  PHC2349	Organ or tissue donation
  PHC1224	Health department, not otherwise specified
  PHC2347	Ryan White clinic
  PHC1219	Sexually transmitted infections clinic
  PHC2348	Syringe services program

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

  Code	Display
  OTH	Other source (specifiy)
  UNK	Unknown