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HES/SUS ICD-10 "X" padding #2054

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Jongmassey merged 1 commit into from
Sep 15, 2026
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HES/SUS ICD-10 "X" padding #2054

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6 changes: 6 additions & 0 deletions docs/data-sources/apc.md
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Expand Up @@ -38,6 +38,12 @@ The dataset does not include any patients who have not been discharged (i.e., pa
- The post-transfer spell may have additional diagnoses or procedures of interest so it is often useful to include them.
- Transfers may occasionally come from private hospitals where a patient's condition worsened to require e.g. intensive care; if the initial spell was not NHS funded we would probably not have the original spell in our data.

### \* Notes on ICD-10 codes:

Diagnosis codes in the APCS dataset use the ICD-10 coding system in a slightly non-standard manner:
three-character ICD-10 codes in the APCS dataset are padded to four characters with a terminal `X` character.


## Reference tables

### Admission method reference table
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