Diagnosis search

The primary diagnosis, recorded using ICD-10, is the main condition treated or investigated during the episode of care.

The diagnoses in this area are broken down into summary bands (Diagnosis Chapters), eg C00 - D48: Neoplasms. These are then broken down further into 3-character codes (Primary Diagnosis (3 Char)), eg C03: Malignant neoplasm of gum, and further still into 4-character codes (Primary Diagnosis (4 Char)), eg C031: Malignant neoplasm of lower gum.

HES has a policy of making its data as accurate as possible, so occasionally, minor in-year modifications occur to data in HES universes that are accessible to users of Online HES (the HES data warehouse). However, the Self Service area consists of the data as at the publication date and is not updated for in-year changes. Therefore, when such updates occur they may lead to minor inconsistencies between Online HES and data in the Self Service area.

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