The AL1 segment contains patient allergy information of various types. Most of this information will be derived from user-defined tables. Each AL1 segment describes a single patient allergy.
HL7 Attribute Table - AL1 - Patient Allergy Information
| Base Framework | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Seq# | Data Element | Description | Flags | Implement | Cardinality | Length | C.LEN | Vocabulary | Data Type | |
 AL1 | ||||||||||
  | 1 | 00203 | Set ID - AL1 | SHOULD | [1..1] | [1..4] | SI Sequence ID | |||
| 2 | 00204 | Allergen Type Code | MAY | [0..1] | ex.:AllergenType (CD) | CWE Coded with Exceptions | |||
| 3 | 00205 | Allergen Code/Mnemonic/Description | MAY | [0..1] | CWE Coded with Exceptions | ||||
| 4 | 00206 | Allergy Severity Code | MAY | [0..1] | ex.:AllergySeverity (CD) | CWE Coded with Exceptions | |||
| 5 | 00207 | Allergy Reaction Code | = Truncation not allowed! | MAY | [0..*] | 15 | ST String Data | ||
 | 6 | 00208 | Identification Date | W withdrawn Element | SHOULD NOT | |||||
| Seq# | Data Element | Description | Flags | Implement | Cardinality | Length | C.LEN | Vocabulary | Data Type | |
|---|---|---|---|---|---|---|---|---|---|---|
| AL1 | ||||||||||
| 1 | 00203 | Set ID - AL1 | SHALL | [1..1] | [1..4] | SI Sequence ID | |||
| 2 | 00204 | Allergen Type Code | MAY | [0..1] | ex.:AllergenType (CD) hl7VS-allergyType (VS) allergenType (CS) | CWE Coded with Exceptions | |||
| 3 | 00205 | Allergen Code/Mnemonic/Description | MAY | [0..1] | CWE Coded with Exceptions | ||||
| 4 | 00206 | Allergy Severity Code | MAY | [0..1] | ex.:AllergySeverity (CD) hl7VS-allergySeverity (VS) allergySeverity (CS) | CWE Coded with Exceptions | |||
| 5 | 00207 | Allergy Reaction Code | = Truncation not allowed! | MAY | [0..*] | 15 | ST String Data | ||
| 6 | 00208 | Identification Date | W withdrawn Element | SHOULD NOT | |||||
| Base Framework | Base Standard Profile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seq# | Data Element | Description | Flags | Implement | Cardinality | Length | C.LEN | Vocabulary | Data Type | Implement | Vocabulary | |
| AL1 | ||||||||||||
| 1 | 00203 | Set ID - AL1 | SHOULD | [1..1] | [1..4] | SI Sequence ID | SHALL | ||||
| 2 | 00204 | Allergen Type Code | MAY | [0..1] | ex.:AllergenType (CD) | CWE Coded with Exceptions | MAY | hl7VS-allergyType (VS) allergenType (CS) | |||
| 3 | 00205 | Allergen Code/Mnemonic/Description | MAY | [0..1] | CWE Coded with Exceptions | MAY | |||||
| 4 | 00206 | Allergy Severity Code | MAY | [0..1] | ex.:AllergySeverity (CD) | CWE Coded with Exceptions | MAY | hl7VS-allergySeverity (VS) allergySeverity (CS) | |||
| 5 | 00207 | Allergy Reaction Code | = Truncation not allowed! | MAY | [0..*] | 15 | ST String Data | MAY | |||
| 6 | 00208 | Identification Date | W withdrawn Element | SHOULD NOT | SHOULD NOT | ||||||
| Base Framework | Base Standard Profile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seq# | Data Element | Description | Flags | Optionality | Repetition | Length | C.LEN | Table | Data Type | Optionality | Table | |
| AL1 |
||||||||||||
|
1 | 00203 | Set ID - AL1 | O | [1..4] | SI Sequence ID |
R | |||||
|
2 | 00204 | Allergen Type Code | O | CWE Coded with Exceptions |
(0127) | ||||||
|
3 | 00205 | Allergen Code/Mnemonic/Description | O | CWE Coded with Exceptions |
|||||||
|
4 | 00206 | Allergy Severity Code | O | CWE Coded with Exceptions |
(0128) | ||||||
|
5 | 00207 | Allergy Reaction Code | O | Y | 15= | ST String Data |
|||||
|
6 | 00208 | Identification Date | W | ||||||||
| Seq# | Data Element | Description | Optionality | Repetition | Length | C.LEN | Table | Data Type | |
|---|---|---|---|---|---|---|---|---|---|
| AL1 |
|||||||||
|
1 | 00203 | Set ID - AL1 | R | [1..4] | SI Sequence ID |
|||
|
2 | 00204 | Allergen Type Code | O | (0127) | CWE Coded with Exceptions |
|||
|
3 | 00205 | Allergen Code/Mnemonic/Description | O | CWE Coded with Exceptions |
||||
|
4 | 00206 | Allergy Severity Code | O | (0128) | CWE Coded with Exceptions |
|||
|
5 | 00207 | Allergy Reaction Code | O | Y | 15= | ST String Data |
||
|
6 | 00208 | Identification Date | W | |||||
Definition: This field contains the number that identifies this transaction. For the first occurrence of the segment, the sequence number shall be one, for the second occurrence, the sequence number shall be two, etc.
Definition: This field indicates a general allergy category (drug, food, pollen, etc.). Refer to User-defined Table 0127 - Allergen Type in Chapter 2C, Code Tables, for suggested values.
Definition: This field uniquely identifies a particular allergen. This element may conform to some external, standard coding system (that must be identified), or it may conform to local, largely textual or mnemonic descriptions.
Definition: This field indicates the general severity of the allergy. Refer to User-defined Table 0128 - Allergy Severity in Chapter 2C, Code Tables, for valid values.
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: The Al-6 field was retained for backward compatibility only as of v 2.4 and has been withdrawn as of v 2.7. The reader is referred to the IAM-11 - Onset Date or IAM-13 - Inset Date fields for dates when the allergy was identified..
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