This field normally contains the patient's home postcode. However, if a patient is away from home for long periods, such as in a university hall of residence, the postcode of their typical residence is used instead.

If the postcode contains fewer than eight characters, spaces are placed between the two parts of the postcode so that the second part always starts at the sixth character position.

The Postcode of patient (homeadd) field contains sensitive data. Access to it requires the approval of the Security and Confidentiality Advisory Group (SCAG).

aann naa = Postcode

ZZ99 3CZ = England, GB, UK (not otherwise stated)

ZZ99 3VZ = No fixed abode

ZZ99 3WZ = Not known + sundry categories

ZZ99 2WZ = Northern Ireland

ZZ99 1WZ = Scotland

ZZ99 3GZ = Wales

ZZ99 NNN = Other pseudo codes used for patients normally resident abroad (where NNN is the country code listed in the NHS postcode directory)