| MedicationUsage | SubstanceAdministration |
| identifier | .id |
| basedOn | .outboundRelationship[typeCode=FLFS].target[classCode=SBADM or PROC or PCPR or OBS, moodCode=RQO orPLAN or PRP] |
| partOf | .outboundRelationship[typeCode=COMP]/target[classCode=SPLY or SBADM or PROC or OBS,moodCode=EVN] |
| status | .statusCode |
| statusReason | .inboundRelationship[typeCode=SUBJ].source[classCode=CACT, moodCode=EVN].reasonCOde |
| category | .inboundRelationship[typeCode=COMP].source[classCode=OBS, moodCode=EVN, code="type of medication usage"].value |
| medication | .participation[typeCode=CSM].role[classCode=ADMM or MANU] |
| subject | .participation[typeCode=SBJ].role[classCode=PAT] |
| encounter | .inboundRelationship[typeCode=COMP].source[classCode=ENC, moodCode=EVN, code="type of encounter or episode"] |
| effective[x] | .effectiveTime |
| dateAsserted | .participation[typeCode=AUT].time |
| informationSource | .participation[typeCode=INF].role[classCode=PAT, or codes for Practitioner or Related Person (if PAT is the informer, then syntax for self-reported =true) |
| derivedFrom | .outboundRelationship[typeCode=SPRT]/target[classCode=ACT,moodCode=EVN] |
| reason | .reasonCode |
| note | .inboundRelationship[typeCode=SUBJ]/source[classCode=OBS,moodCode=EVN,code="annotation"].value |
| renderedDosageInstruction | SubstanceAdministration.text |
| dosage | refer dosageInstruction mapping |
| adherence | outboundRelationship[typeCode=PERT].target[classCode=OBV,moodCode=EVN].value[xsi:type=BL] |