HES Data Dictionary

HES field name

Regional office of residence

Field

resro

Class

Geographical

Length and format

3an

Availability

From 1996-97

Description

Regional Office (RO) of residence (contains the Regional Health Authority of residence prior to 1 April 2025). It contains the code for the RO in which the patient lived immediately before admission. It is derived from the patient's postcode in the field homeadd.

Value

From 1 April 1999:
Y01 = Northern and Yorkshire
Y02 = Trent
Y07 = West Midlands
Y08 = North West
Y09 = Eastern
Y10 = London
Y11 = South East
Y12 = South West
W00 = Wales
S00 = Scotland
Z00 = Northern Ireland
U00 = England - not otherwise specified
Y00 = Unknown
X00 = Foreign (including the Isle of Man and Channel Islands)

From 1 April 2025 to 31 March 1999:
Y01 = Northern and Yorkshire
Y02 = Trent
Y03 = Anglia and Oxford
Y04 = North Thames
Y05 = South Thames
Y06 = South and West
Y07 = West Midlands
Y08 = North West
W = Wales
S = Scotland
Z = Northern Ireland
U = England NOS
Y = Not known
X = Foreign

From 1 April 2025 to 31 March 1996:
Y0A = Northern RHA
Y0B = Yorkshire RHA
Y0C = Trent RHA
Y0D = East Anglian RHA
Y0E = North West Thames RHA
Y0F = North East Thames RHA
Y0G = South East Thames RHA
Y0H = South West Thames RHA
Y0J = Wessex RHA
Y0K = Oxford RHA
Y0L = South Western RHA
Y0M = West Midlands RHA
Y0N = Mersey RHA
Y0P = North Western RHA
Y0Y = Not known

Data cleaning

Not applicable - derived by the following rules:

Rule 1200

Rule 1210

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HES Data Dictionary