Allergy intolerance table

  • Release version: Australia
  • Updated March 12, 2026
  • 2 minutes to read
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    Summary of Allergy Intolerance Table

    The Allergy Intolerance table ([snhclsallergy]) in ServiceNow is designed to store clinical assessments related to allergies or intolerances. This table captures the risk of adverse reactions to specific substances and helps healthcare providers manage patient safety effectively.

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    Key Features

    • Patient Associations: Tracks any allergy or intolerance linked to a patient.
    • Data Points: Includes critical information such as allergy code, type, category, criticality, clinical status, and relevant dates.
    • Role Requirement: Configuration of the table requires the snhcls.admin role.
    • Auto-Numbering: The system auto-generates an identifier for each allergy or intolerance entry, beginning from ALLR00001001, with the ability to customize the format.

    Key Outcomes

    By utilizing the Allergy Intolerance table, ServiceNow customers can efficiently manage and document allergies and intolerances, which enhances patient care and safety. The structured data supports clinical decision-making and compliance with healthcare standards, ensuring that all relevant information is accessible and up to date.

    The Allergy intolerance [sn_hcls_allergy] table stores the information about a clinical assessment of an allergy or intolerance; a propensity, or a potential risk to an individual, to have an adverse reaction on future exposure to the specified substance, or class of substance.

    Key features

    • Stores any allergy or intolerance associated with a patient.
    • Includes the allergy code, type, category, criticality, clinical status, date recorded, and date of onset.

    Role required to configure the table: sn_hcls.admin.

    For more information, see Healthcare and Life Sciences data model.

    Table 1. Allergy intolerance form fields

    Field

    Data type

    Description

    Age of onset

    String

    Age at which an individual first experience the allergy or intolerance.

    Allergy intolerance code

    Reference

    Identifier of the allergy or intolerance.

    Category

    Choice list

    Category of an identified substance associated with the allergy or intolerance.

    The following categories are available by default:
    • Biological
    • Environment
    • Food
    • Medication

    For more information about the available categories, see allergy intolerance categories defined in the FHIR specifications.

    Clinical status

    Choice list

    Status of the allergy or intolerance under clinical trial.

    The following statuses are available by default:
    • Active
    • Inactive
    • Resolved

    For more information about the available statuses, see allergy intolerance clinical statuses defined in the FHIR specifications.

    Criticality

    Choice list

    Estimate of the potential clinical harm or seriousness of a reaction to an identified substance.

    The following types are available by default:
    • High
    • Low
    • Unable to access

    For more information about the available types, see allergy intolerance criticality types defined in the FHIR specifications.

    Date of onset

    Date/Time

    Date and time that the allergy or intolerance began.

    Date recorded

    Date/Time

    Date the first version of the allergy or intolerance was recorded into the application.

    Encounter

    Reference

    Healthcare event during which this allergy intolerance was asserted.

    External id

    String

    Identifier of the record in an electronic medical record (EMR) system.

    Number

    String

    Alpha-numeric profile identifier of the allergy intolerance.

    The value is auto-generated and is incremented every time you add a new allergy or intolerance to your ServiceNow instance. The initial value for the Number field is ALLR00001001.
    Note:
    To customize the number, define the auto-numbering format for the Allergy intolerance [sn_hcls_allergy] table. For more information, see Add auto-numbering records in a table.

    Patient

    Reference

    Patient who has the allergy or intolerance.

    Source

    Reference

    Source system details of an external healthcare system in a ServiceNow instance.

    Type

    Choice list

    Underlying physiological mechanism for a reaction risk.

    The following types are available by default:
    • Allergy
    • Intolerance

    For more information about the available types, see allergy intolerance types defined in the FHIR specifications.

    Verification status

    Choice list

    Assertion about certainty associated with a propensity or potential risk of a reaction to the identified substance.

    The following statuses are available by default:
    • Confirmed
    • Entered in error
    • Refuted
    • Unconfirmed

    For more information about the available statuses, see allergy intolerance verification statuses defined in the FHIR specifications.