AllergyIntolerance

Profile

The AllergyIntolerance must conform to the Graphnet specific Allergy Intolerance profile.

Extensions

No extensions are used for the AllergyIntolerance profile within the Graphnet solution.

Implemented Data Items

The Graphnet FHIR AllergyIntolerance API currently supports a limited number of elements from the FHIR AllergyIntolerance resource.

The table below details where constraints are added. The FHIR API will not allow records to be stored containing restricted elements.

Path	Level of Support
AllergyIntolerance.identifier	System & Value only
AllergyIntolerance.clinicalStatus	"Active" only
AllergyIntolerance.category	Prohibited – not supported
AllergyIntolerance.code	Restricted values (see below)
AllergyIntolerance.onset	Limited to dateTime only
AllergyIntolerance.lastOccurence	Prohibited – not supported
AllergyIntolerance.note	Limited to text only
AllergyIntolerance.reaction	Limited to one only
AllergyIntolerance.reaction.substance	Limited to one only (no text)
AllergyIntolerance.reaction.manifestation	Limited to one only (no text)
AllergyIntolerance.reaction.onset	Prohibited – not supported
AllergyIntolerance.reaction.severity	Prohibited – not supported
AllergyIntolerance.reaction.exposureRoute	Prohibited – not supported
AllergyIntolerance.reaction.note	Prohibited – not supported

AllergyIntolerance.identifier

Multiple identifiers are accepted, though only the system and value components should be present.

"identifier": [
        {
            "system": "http://www.acme.com/health/Id",
            "value": "dc6a8b58-1ca4-421c-8695-e2f592db30cb"
        },
        {
            "system": "http://www.med.com/id",
            "value": "32443-123/YH"
        }
    ]

AllergyIntolerance.code

A maximum of two codes can be attached to each record.

When using SNOMED CT codes, a SNOMED CT Concept Code is recorded as

{
  "system": "http://snomed.info/sct",
  "code": "762952008",
  "display": "Peanut"
}

If the SNOMED description Id is also known, this can be recorded making use of the standard FHIR extension available for this

{
    "extension": [
        {
            "extension": [
                {
                    "url": "descriptionId",
                    "valueString": "3635998019"
                },
                {
                    "url": "descriptionDisplay",
                    "valueString": "Peanuts"
                }
            ],
            "url": "https://fhir.hl7.org.uk/STU3/StructureDefinition/Extension-coding-sctdescid"
        }
    ],
    "system": "http://snomed.info/sct",
    "code": "762952008",
    "display": "Peanut"
}