Letters

Version 3 of Read codes addresses many difficulties

BMJ 1995; 311 doi: https://doi.org/10.1136/bmj.311.7010.951a (Published 07 October 1995) Cite this as: BMJ 1995;311:951
  1. Chris Payne
  1. Director of Read code development NHS Centre for Coding and Classification, Loughborough, Leicestershire LE11 2TG

    EDITOR,--N Smith and colleagues highlight some weaknesses in the Read codes.1 Unfortunately, it is not clear to casual readers that the criticism is valid only for the 4 byte and 5 byte sets of version 2. Version 3 has been available for the past 12 months and addresses these limitations.

    One of the main structural limitations of a simple coding scheme, such as the International Classification of Diseases, the Symmetrical Nomenclature of Medicine (SNOMED), or earlier Read codes, is that …

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