Archive: General - NHS Digital

Coding validation

March 4, 2009

Correct assignment of HRGs is dependent on the depth and accuracy of clinical coding. The grouper will report an error if it encounters an invalid or poorly coded primary diagnosis or primary procedure in an input record.

pdf icon Guide to Unbundling (Feb 2009 update) [416kb]

This guide explains unbundling and describes how the concept has been applied to specific chapter areas within HRG4.

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