Database
[{_id:"d283015f-91e9-4404-9202-093c28d6a931",referencedGeneralPractitioner:[{resourceType:"practitioner",cachedIdentifier:[{system:{value:"urn:oid:1.3.6.1.4.1.19126.3"},value:{value:"14277399B"}},{system:{value:"2"},value:{value:"3"}}]}]},{_id:"d283015f-91e9-4404-9202-093c28d6a932",referencedGeneralPractitioner:[{resourceType:"practitioner",cachedIdentifier:[{system:{value:"urn:oid:1.3.6.1.4.1.19126.3"},value:{value:"14"}}]}]}]
Query
db.collection.find({"referencedGeneralPractitioner.cachedIdentifier":{"$elemMatch":{"value.value":"14277399B","system.value":"urn:oid:1.3.6.1.4.1.19126.3"}}})