description: The measure population membership is the number of subjects in the measure population after exclusions. See ([https://hl7.org/fhir/us/cqfmeasures/measure-conformance.html](https://hl7.org/fhir/us/cqfmeasures/measure-conformance.html)) for further discussion. package_name: hl7.fhir.us.davinci derivation: constraint name: MeasurePopulationMembership type: Extension elements: url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/cqf-measurePopulationMembership'} index: 0 value: short: The number of subjects in the measure population after exclusions. choices: [valueQuantity] index: 2 valueQuantity: {type: Quantity, short: The number of subjects in the measure population after exclusions., choiceOf: value, index: 3} package_version: deqm-5.0.0-ballot class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/cqf-measurePopulationMembership base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.0.0-ballot