<status value="draft"/> <experimental value="false"/> <date value="2020-04-09T21:10:28+00:00"/> <publisher value="HL7 (FHIR Project)"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> <telecom> <system value="email"/> <value value="fhir@lists.hl7.org"/> </telecom> </contact> <description value="A Master Patient Index (MPI) assessment of whether a candidate patient record is a match or not."/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/match-grade"/> <content value="complete"/> <concept> <code value="certain"/> <display value="Certain Match"/> <definition value="This record meets the matching criteria to be automatically considered as a full match."/> </concept> <concept> <code value="probable"/> <display value="Probable Match"/> <definition value="This record is a close match, but not a certain match. Additional review (e.g. by a human) may be required before using this as a match."/> </concept> <concept> <code value="possible"/> <display value="Possible Match"/> <definition value="This record may be a matching one. Additional review (e.g. by a human) SHOULD be performed before using this as a match."/> </concept> <concept> <code value="certainly-not"/> <display value="Certainly Not a Match"/> <definition value="This record is known not to be a match. Note that usually non-matching records are not returned, but in some cases records previously or likely considered as a match may specifically be negated by the matching engine."/> </concept> </CodeSystem>

This code system http://terminology.hl7.org/CodeSystem/match-grade defines the following codes:

Code	Display	Definition
certain	Certain Match	This record meets the matching criteria to be automatically considered as a full match.
probable	Probable Match	This record is a close match, but not a certain match. Additional review (e.g. by a human) may be required before using this as a match.
possible	Possible Match	This record may be a matching one. Additional review (e.g. by a human) SHOULD be performed before using this as a match.
certainly-not	Certainly Not a Match	This record is known not to be a match. Note that usually non-matching records are not returned, but in some cases records previously or likely considered as a match may specifically be negated by the matching engine.