Medical record number clarification

[ibrahim seven]

Hello Cerner Team, 

Can you please help me understand which one of these returns are actually the MRN? Please see below:

"identifier": [{ "use": "usual", "type": { "coding": [{ "system": "http://hl7.org/fhir/v2/0203", "code": "MR", "display": "Medical record number", "userSelected": false }], "text": "Community Medical Record Number" }, "system": "urn:oid:2.16.840.1.113883.3.787.0.0", "value": "5", "_value": { "extension": [{ "url": "http://hl7.org/fhir/StructureDefinition/rendered-value", "valueString": "5" }] } }, { "use": "usual", "type": { "coding": [{ "system": "http://hl7.org/fhir/v2/0203", "code": "MR", "display": "Medical record number", "userSelected": false }], "text": "MRN" }, "system": "urn:oid:2.16.840.1.113883.6.1000", "value": "6954", "_value": { "extension": [{ "url": "http://hl7.org/fhir/StructureDefinition/rendered-value", "valueString": "00000006954" }] } }, { "use": "usual", "type": { "text": "Military Id" }, "system": "urn:oid:2.16.840.1.113883.3.42.10001.100001.12", "value": "10050008089", "_value": { "extension": [{ "url": "http://hl7.org/fhir/StructureDefinition/rendered-value", "valueString": "10050008089" }] } }, { "use": "usual", "type": { "text": "MIllennium Person Identifier" }, "value": "11005", "_value": { "extension": [{ "url": "http://hl7.org/fhir/StructureDefinition/rendered-value", "valueString": "11005" }] }, "period": { "start": "2020-12-18T19:06:26.000Z" } }],

[Sean OQuinn (Cerner)]

Each client will have a different set of identifiers and MRNs. Most clients will have. Community Medical Record Number (CMRN) and a Medical Record Number (MRN. Cerner, but you would need to work with each client to determine which MRN maybe important for your uses.