The IAR segment is used to transmit a single reaction and information associated with this single reaction occurrence for a particular patient allergy (IAM - patient adverse reaction).
HL7 Attribute Table - IAR - allergy reaction
| Base Framework | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Seq# | Data Element | Description | Flags | Implement | Cardinality | Length | C.LEN | Vocabulary | Data Type | |
 IAR | ||||||||||
  | 1 | 03296 | Allergy Reaction Code | SHOULD | [1..1] | CWE Coded with Exceptions | ||||
| 2 | 03297 | Allergy Severity Code | SHOULD | [1..1] | ex.:AllergySeverity (CD) | CWE Coded with Exceptions | |||
| 3 | 03298 | Sensitivity to Causative Agent Code | MAY | [0..1] | ex.:SensitivityToCausativeAgentCode (CD) | CWE Coded with Exceptions | |||
 | 4 | 03299 | Management | = Truncation not allowed! | MAY | [0..1] | 250 | ST String Data | ||
| Seq# | Data Element | Description | Flags | Implement | Cardinality | Length | C.LEN | Vocabulary | Data Type | |
|---|---|---|---|---|---|---|---|---|---|---|
| IAR | ||||||||||
| 1 | 03296 | Allergy Reaction Code | SHALL | [1..1] | CWE Coded with Exceptions | ||||
| 2 | 03297 | Allergy Severity Code | SHALL | [1..1] | ex.:AllergySeverity (CD) hl7VS-allergySeverity (VS) allergySeverity (CS) | CWE Coded with Exceptions | |||
| 3 | 03298 | Sensitivity to Causative Agent Code | MAY | [0..1] | ex.:SensitivityToCausativeAgentCode (CD) hl7VS-sensitivityToCausativeAgentCode (VS) sensitivityToCausativeAgent (CS) | CWE Coded with Exceptions | |||
| 4 | 03299 | Management | = Truncation not allowed! | MAY | [0..1] | 250 | ST String Data | ||
| Base Framework | Base Standard Profile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seq# | Data Element | Description | Flags | Implement | Cardinality | Length | C.LEN | Vocabulary | Data Type | Implement | Vocabulary | |
| IAR | ||||||||||||
| 1 | 03296 | Allergy Reaction Code | SHOULD | [1..1] | CWE Coded with Exceptions | SHALL | |||||
| 2 | 03297 | Allergy Severity Code | SHOULD | [1..1] | ex.:AllergySeverity (CD) | CWE Coded with Exceptions | SHALL | hl7VS-allergySeverity (VS) allergySeverity (CS) | |||
| 3 | 03298 | Sensitivity to Causative Agent Code | MAY | [0..1] | ex.:SensitivityToCausativeAgentCode (CD) | CWE Coded with Exceptions | MAY | hl7VS-sensitivityToCausativeAgentCode (VS) sensitivityToCausativeAgent (CS) | |||
| 4 | 03299 | Management | = Truncation not allowed! | MAY | [0..1] | 250 | ST String Data | MAY | |||
| Base Framework | Base Standard Profile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seq# | Data Element | Description | Flags | Optionality | Repetition | Length | C.LEN | Table | Data Type | Optionality | Table | |
| IAR |
||||||||||||
|
1 | 03296 | Allergy Reaction Code | O | CWE Coded with Exceptions |
R | ||||||
|
2 | 03297 | Allergy Severity Code | O | (0128) | CWE Coded with Exceptions |
R | |||||
|
3 | 03298 | Sensitivity to Causative Agent Code | O | CWE Coded with Exceptions |
(0436) | ||||||
|
4 | 03299 | Management | O | 250= | ST String Data |
||||||
| Seq# | Data Element | Description | Optionality | Repetition | Length | C.LEN | Table | Data Type | |
|---|---|---|---|---|---|---|---|---|---|
| IAR |
|||||||||
|
1 | 03296 | Allergy Reaction Code | R | CWE Coded with Exceptions |
||||
|
2 | 03297 | Allergy Severity Code | R | (0128) | CWE Coded with Exceptions |
|||
|
3 | 03298 | Sensitivity to Causative Agent Code | O | (0436) | CWE Coded with Exceptions |
|||
|
4 | 03299 | Management | O | 250= | ST String Data |
|||
Definition: This field identifies the specific allergic reaction that was documented. This element may conform to some external, standard coding system, or it may conform to local, largely textual or mnemonic descriptions (e.g., convulsions, sneeze, rash, etc.).
Definition: This field indicates the general severity of the allergy. Refer to User-defined Table 0128 - Allergy severity code in Chapter 2C, Code Tables, for suggested values.
Definition: This field contains the reason why the patient should not be exposed to a substance. Refer to User-defined Table 0436 - Sensitivity to causative Agent code in Chapter 2C, Code Tables, for suggested values.
Definition: This field contains a textual description of the actions that were performed in response to the reaction.
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