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
  PHC1555	Illicit opioid
  PHC1556	Prescription opioid
  PHC2115	Marijuana/cannabinoid (other than smoking)
  PHC2116	Opioid, DEA schedule I (e.g., heroin)
  PHC2117	Opioid, DEA schedule II - IV (e.g., methadone, oxycodone)
  PHC2245	Opioid NOS

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20200901

  Code	Display
  441527004	Stimulant
  387085005	Cocaine
  387499002	Methamphetamine

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

  Code	Display
  OTH	other (specify)
  UNK	Unknown