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HES Data Dictionary
| HES field name | Primary diagnosis - 4 characters | ||||
|---|---|---|---|---|---|
| Field | diag4 | ||||
| Class | Clinical | ||||
| Length and format | 4an | ||||
| Availability | |||||
| Description | |||||
|
This provides the first four characters of the primary diagnosis (diag_01). |
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| Value | |||||
4an = A valid ICD-9 or ICD-10 diagnosis code null = Not applicable |
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| Data cleaning |
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