Subsidiary Read Diagnostic Code

This data item is / was included in the following data sets / collections between the dates shown:

Data Set / Collection	Valid From	Valid To
APC ds99	1^st April 1999
OP ds	1^st April 1999

This is the subsidiary diagnosis code. It is an entry of the diagnostic index according to the Read classification using codes maintained by the NHS Centre for Coding and Classification.

Format: 7 character alpha-numeric