EHDS Logical Information Models
0.1.0 - ci-build

EHDS Logical Information Models, published by Xt-EHR. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/Xt-EHR/xt-ehr-common/tree/stakeholder-consultation-D6-1 and changes regularly. See the Directory of published versions

## Logical Model: Allergy intolerance model

Official URL: https://www.xt-ehr.eu/specifications/fhir/StructureDefinition/EHDSAllergyIntolerance | Version: 0.1.0
Draft as of 2025-07-08 | Computable Name: EHDSAllergyIntolerance

EHDS refined base model for allergy/intolerance

Allergy and Intolerances is suggested as a mandatory section of Patient Summary. The only required element for each listed allergy, is specifying the agent or allergen. The Information elements for each allergy are listed in the EHDS-PS-AllergyIntolerance model below.
If the producing system have no record of allergies to list (e.g. the patient has no allergies, or the system have no allergy information), the system must provide a reason. This is in accordance with the specification in ISO IPS and updates to the HL7 FHIR IPS. The information elements and value sets suggested are taken from eHN Guideline, MyHealth@EU and HL7 FHIR IPS. In addition to that, the new ICD-11 Allergen classification has been added.

Usages:

- Use this Logical Model: Patient summary model

### Views of Logical Model

Description of Differentials, Snapshots and how the different presentations work.

- Differential Table
- Snapshot Table

This structure is derived from EHDSDataSet

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSAllergyIntolerance |  | 0..* | EHDSDataSet | Elements defined in Ancestors:header, presentedForm Allergy intolerance model Instances of this logical model can be the target of a Reference
agentOrAllergen |  | 1..1 | CodeableConcept | A specific allergen or other agent/substance (drug, food, chemical agent, etc.) to which the patient has an adverse reaction propensity. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.24 eHDSIActiveIngredient (ATC, used in MH@EU); 1.3.6.1.4.1.12559.11.10.1.3.1.42.61 eHDSISubstance (EMA SMS, used in MH@EU); 1.3.6.1.4.1.12559.11.10.1.3.1.42.19 eHDSIAllergenNoDrug (SCT, used in MH@EU); ICD-11 Allergens
typeOfPropensity |  | 0..1 | CodeableConcept | This element describes whether this condition refers to an allergy, non-allergy intolerance, or unknown class of intolerance (not known to be allergy or intolerance) Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.18 eHDSIAdverseEventType (SCT, used in MH@EU); http://hl7.org/fhir/ValueSet/allergy-intolerance-type (HL7, required in HL7 FHIR)
description |  | 0..1 | string | Textual description of the allergy or intolerance
criticality |  | 0..1 | CodeableConcept | Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.57 eHDSICriticality (HL7, used in MH@EU); http://hl7.org/fhir/ValueSet/allergy-intolerance-criticality (HL7, required in HL7 FHIR)
certainty |  | 0..1 | CodeableConcept | Assertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.58 eHDSIAllergyCertainty (HL7, used in MH@EU) ; http://hl7.org/fhir/ValueSet/allergyintolerance-verification (HL7, required in HL7 FHIR)
status |  | 0..1 | CodeableConcept | Current status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.59 eHDSIAllergyStatus (HL7, used in MH@EU); http://hl7.org/fhir/ValueSet/allergyintolerance-clinical (HL7, required in HL7 FHIR)
onsetDate |  | 0..1 | dateTime | When allergy or intolerance was identified
endDate |  | 0..1 | dateTime | Date of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)
reaction |  | 0..* | Base | Adverse Reaction Events linked to exposure to substance..
manifestation |  | 0..* | CodeableConcept | Description of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction). Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.5 eHDSIIllnessandDisorder (ICD-10, alternative in MH@EU); 1.3.6.1.4.1.12559.11.10.1.3.1.42.11 eHDSIReactionAllergy (SCT, alternative in MH@EU); ICD-11 MMS
date |  | 0..1 | dateTime | Date and time of allergy manifestation
severity |  | 0..1 | CodeableConcept | Severity of the clinical manifestation of the allergic reaction. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.13 eHDSISeverity (SCT, used in MH@EU); http://hl7.org/fhir/ValueSet/reaction-event-severity (HL7, Required in HL7 FHIR)
onsetDate |  | 0..1 | dateTime | Date of the observation of the reaction
Documentation for this format

#### Terminology Bindings (Differential)

Path | Conformance | ValueSet | URI
EHDSAllergyIntolerance.agentOrAllergen | preferred |
EHDSAllergyIntolerance.typeOfPropensity | preferred |
EHDSAllergyIntolerance.criticality | preferred |
EHDSAllergyIntolerance.certainty | preferred |
EHDSAllergyIntolerance.status | preferred |
EHDSAllergyIntolerance.reaction.manifestation | preferred |
EHDSAllergyIntolerance.reaction.severity | preferred |

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSAllergyIntolerance |  | 0..* | EHDSDataSet | Elements defined in Ancestors:header, presentedForm Allergy intolerance model Instances of this logical model can be the target of a Reference
header |  | 1..1 | Base | Common header for all patient-related data
subject |  | 1..1 | EHDSPatient | Subject
identifier |  | 0..* | Identifier | Business identifier for the object
authorship |  | 1..* | Base | Authorship
author[x] |  | 1..1 |  | Author
authorEHDSHealthProfessional |  |  | EHDSHealthProfessional |
authorEHDSOrganisation |  |  | EHDSOrganisation |
authorEHDSDevice |  |  | EHDSDevice |
datetime |  | 1..1 | dateTime | Date and time of authoring/issuing
lastUpdate |  | 0..1 | dateTime | Date and time of the last update to the resource
status |  | 1..1 | CodeableConcept | Status of the resource
statusReason[x] |  | 0..1 |  | Reason for the current status of the resource.
statusReasonCodeableConcept |  |  | CodeableConcept |
statusReasonString |  |  | string |
language |  | 0..1 | CodeableConcept | Language Binding Description: (preferred): BCP 47
version |  | 0..1 | string | Version
presentedForm |  | 0..* | EHDSAttachment | A narrative easy-to-read representation of the full data set, e.g. PDF-version of a document
agentOrAllergen |  | 1..1 | CodeableConcept | A specific allergen or other agent/substance (drug, food, chemical agent, etc.) to which the patient has an adverse reaction propensity. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.24 eHDSIActiveIngredient (ATC, used in MH@EU); 1.3.6.1.4.1.12559.11.10.1.3.1.42.61 eHDSISubstance (EMA SMS, used in MH@EU); 1.3.6.1.4.1.12559.11.10.1.3.1.42.19 eHDSIAllergenNoDrug (SCT, used in MH@EU); ICD-11 Allergens
typeOfPropensity |  | 0..1 | CodeableConcept | This element describes whether this condition refers to an allergy, non-allergy intolerance, or unknown class of intolerance (not known to be allergy or intolerance) Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.18 eHDSIAdverseEventType (SCT, used in MH@EU); http://hl7.org/fhir/ValueSet/allergy-intolerance-type (HL7, required in HL7 FHIR)
description |  | 0..1 | string | Textual description of the allergy or intolerance
criticality |  | 0..1 | CodeableConcept | Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.57 eHDSICriticality (HL7, used in MH@EU); http://hl7.org/fhir/ValueSet/allergy-intolerance-criticality (HL7, required in HL7 FHIR)
certainty |  | 0..1 | CodeableConcept | Assertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.58 eHDSIAllergyCertainty (HL7, used in MH@EU) ; http://hl7.org/fhir/ValueSet/allergyintolerance-verification (HL7, required in HL7 FHIR)
status |  | 0..1 | CodeableConcept | Current status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.59 eHDSIAllergyStatus (HL7, used in MH@EU); http://hl7.org/fhir/ValueSet/allergyintolerance-clinical (HL7, required in HL7 FHIR)
onsetDate |  | 0..1 | dateTime | When allergy or intolerance was identified
endDate |  | 0..1 | dateTime | Date of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)
reaction |  | 0..* | Base | Adverse Reaction Events linked to exposure to substance..
manifestation |  | 0..* | CodeableConcept | Description of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction). Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.5 eHDSIIllnessandDisorder (ICD-10, alternative in MH@EU); 1.3.6.1.4.1.12559.11.10.1.3.1.42.11 eHDSIReactionAllergy (SCT, alternative in MH@EU); ICD-11 MMS
date |  | 0..1 | dateTime | Date and time of allergy manifestation
severity |  | 0..1 | CodeableConcept | Severity of the clinical manifestation of the allergic reaction. Binding Description: (preferred): 1.3.6.1.4.1.12559.11.10.1.3.1.42.13 eHDSISeverity (SCT, used in MH@EU); http://hl7.org/fhir/ValueSet/reaction-event-severity (HL7, Required in HL7 FHIR)
onsetDate |  | 0..1 | dateTime | Date of the observation of the reaction
Documentation for this format

#### Terminology Bindings

Path | Conformance | ValueSet | URI
EHDSAllergyIntolerance.header.language | preferred |
EHDSAllergyIntolerance.agentOrAllergen | preferred |
EHDSAllergyIntolerance.typeOfPropensity | preferred |
EHDSAllergyIntolerance.criticality | preferred |
EHDSAllergyIntolerance.certainty | preferred |
EHDSAllergyIntolerance.status | preferred |
EHDSAllergyIntolerance.reaction.manifestation | preferred |
EHDSAllergyIntolerance.reaction.severity | preferred |

Other representations of model: CSV, Excel