Segment MRG in FHIR

How segment MRG (Merge Patient Information) becomes FHIR R4 resources, from the HL7 Version 2 to FHIR guide.

HL7 v2 definition
Definition of MRG in HL7 v2 2.8
Maps
Account
Used in messages
ADT_A06

To Account2 rows

HL7 v2 sourcev2 typeFHIR elementFHIR typeConditions and notes
MRGwhole segment
statuscode
Value "unknown"
MRG-3Prior Patient Account Number
CXidentifierIdentifier