This is the Continuous Integration Build of FHIR (will be incorrect/inconsistent at times).
See the Directory of published versions 
9.8.9 Resource ClinicalImpression - Mappings
Mappings for the clinicalimpression resource (see Mappings to Other Standards for further information & status).
ClinicalImpression | clinical.general |
identifier | FiveWs.identifier |
status | FiveWs.status |
subject | FiveWs.subject[x] |
encounter | FiveWs.context |
effective[x] | FiveWs.done[x] |
date | FiveWs.recorded |
performer | FiveWs.actor |
problem | FiveWs.why[x] |
ClinicalImpression | Event |
identifier | Event.identifier |
status | Event.status |
statusReason | Event.statusReason |
subject | Event.subject |
encounter | Event.encounter |
effective[x] | Event.occurrence[x] |
performer | Event.performer.actor |
note | Event.note |
ClinicalImpression | Partial mapping for problem evaluation |
identifier | PID-3 |
status | PRB-14 |
statusReason | |
description | |
subject | PID-3 |
encounter | |
effective[x] | PRB-2 |
date | |
performer | ROL-4 |
previous | |
problem | PRB-3 / IAM-7 |
changePattern | |
protocol | |
summary | OBX |
finding | |
item | OBX |
basis | |
prognosisCodeableConcept | PRB-22 |
prognosisReference | |
supportingInfo | |
note | |
ClinicalImpression | |
statusReason | .inboundRelationship[typeCode=SUBJ].source[classCode=CACT, moodCode=EVN].reasonCOde |