Page last updated: 28-NOV-2006

Inpatient, Day Case and Outpatient Activity

Data Sources: Coding of Diagnostic and Procedural Information

When a patient is admitted to hospital as either an inpatient or day case within non-obstetric and non-psychiatric specialties, diagnostic and procedural information is recorded. At present this is recorded using;

  • Diagnostic information:- this is currently recorded using the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD10). Please also see below for changes in dates of recording practice.

  • Procedural information: this is currently recorded using the Office of Population Censuses and Surveys, Classification of Surgical Operations and Procedures (OPCS4). Please also see below for changes in dates of recording practice.

  • Read Codes (used mainly in a primary care setting).

Changes in Coding Practice

ICD
ICD7 - from 1961 to 1967
ICD8 - from 1968 to 1979*
ICD9 - from 1980 to March 1996
ICD10 - from April 1996 onward.

* Please note that for ICD8 - during 1968 to 1974, 3 digit codes were recorded and 1975 to 1979, 4 digits were recorded.

OPCS
General Registrar's Office (GRO) - 1961 to 1970*
OPCS2 - 1971 to 1976
OPCS3 - 1977 to 1988
OPCS4 - 1989 onward

* Please note this could be classed as OPCS1, however, this was not nationally recognised as data as data was collected by the GRO.

 


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