description: The History of Present Illness section describes the history related to the reason for the encounter. It contains the historical details leading up to and pertaining to the patient's current complaint or reason for seeking medical care. package_name: hl7.cda.us.ccda derivation: constraint name: HistoryofPresentIllnessSection type: http://hl7.org/cda/stds/core/StructureDefinition/Section elements: templateId: index: 0 slicing: rules: open discriminator: - {path: root, type: value} min: 1 slices: section: match: {root: 1.3.6.1.4.1.19376.1.5.3.1.3.4} schema: _required: true index: 1 elements: root: pattern: {type: string, value: 1.3.6.1.4.1.19376.1.5.3.1.3.4} type: string index: 2 extension: {index: 3} required: [root] extensions: {} code: short: History of Present illness Narrative index: 4 elements: code: pattern: {type: code, value: 10164-2} type: code index: 5 codeSystem: pattern: {type: string, value: 2.16.840.1.113883.6.1} type: string index: 6 required: [code, codeSystem] title: {index: 7} text: {index: 8} package_version: 4.0.0 class: logical kind: logical url: http://hl7.org/cda/us/ccda/StructureDefinition/HistoryofPresentIllnessSection base: http://hl7.org/cda/stds/core/StructureDefinition/Section version: 4.0.0 required: [code, templateId, text, title]