| Source Element | Usage | Target |
| ClinicalImpression.id | UseElementSameName | ClinicalImpression.id |
| ClinicalImpression.meta | UseElementSameName | ClinicalImpression.meta |
| ClinicalImpression.implicitRules | UseElementSameName | ClinicalImpression.implicitRules |
| ClinicalImpression.language | UseElementSameName | ClinicalImpression.language |
| ClinicalImpression.text | UseElementSameName | ClinicalImpression.text |
| ClinicalImpression.contained | UseElementSameName | ClinicalImpression.contained |
| ClinicalImpression.extension | UseElementSameName | ClinicalImpression.extension |
| ClinicalImpression.modifierExtension | UseElementSameName | ClinicalImpression.modifierExtension |
| ClinicalImpression.patient | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.patient |
| ClinicalImpression.assessor | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.assessor |
| ClinicalImpression.status | UseElementSameName | ClinicalImpression.status |
| ClinicalImpression.date | UseElementSameName | ClinicalImpression.date |
| ClinicalImpression.description | UseElementSameName | ClinicalImpression.description |
| ClinicalImpression.previous | UseElementSameName | ClinicalImpression.previous |
| ClinicalImpression.problem | UseElementSameName | ClinicalImpression.problem |
| ClinicalImpression.trigger[x] | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.trigger |
| ClinicalImpression.investigations | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.investigations |
| ClinicalImpression.investigations.id | UseExtensionFromAncestor | - |
| ClinicalImpression.investigations.extension | UseExtensionFromAncestor | - |
| ClinicalImpression.investigations.modifierExtension | UseExtensionFromAncestor | - |
| ClinicalImpression.investigations.code | UseExtensionFromAncestor | - |
| ClinicalImpression.investigations.item | UseExtensionFromAncestor | - |
| ClinicalImpression.protocol | UseElementSameName | ClinicalImpression.protocol |
| ClinicalImpression.summary | UseElementSameName | ClinicalImpression.summary |
| ClinicalImpression.finding | UseElementSameName | ClinicalImpression.finding |
| ClinicalImpression.finding.id | UseElementSameName | ClinicalImpression.finding.id |
| ClinicalImpression.finding.extension | UseElementSameName | ClinicalImpression.finding.extension |
| ClinicalImpression.finding.modifierExtension | UseElementSameName | ClinicalImpression.finding.modifierExtension |
| ClinicalImpression.finding.item | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.finding.item |
| ClinicalImpression.finding.cause | UseElementRenamed | ClinicalImpression.finding.basis |
| ClinicalImpression.resolved | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.resolved |
| ClinicalImpression.ruledOut | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.ruledOut |
| ClinicalImpression.ruledOut.id | UseExtensionFromAncestor | - |
| ClinicalImpression.ruledOut.extension | UseExtensionFromAncestor | - |
| ClinicalImpression.ruledOut.modifierExtension | UseExtensionFromAncestor | - |
| ClinicalImpression.ruledOut.item | UseExtensionFromAncestor | - |
| ClinicalImpression.ruledOut.reason | UseExtensionFromAncestor | - |
| ClinicalImpression.prognosis | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.prognosis |
| ClinicalImpression.plan | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.plan |
| ClinicalImpression.action | UseExtension | http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.action |