Computerworld New Zealand reports that a bug in an iSoft application used at Gisborne Hospital led to patient details being displayed under someone else's record.
The report says that a bug in Healthview went undetected for two years.
Investigation and notification to iSoft brought to light a system error within Healthview and affecting most local sites using the product, said the hospital in a statement.
iSoft issued an initial fix which prevented the display of the mismatched information and thus the ability for any clinical decisions to be taken on incorrect information, said the hospital.
"A search of historical records by iSoft identified all instances of occurrence relating to laboratory tests, and the records and lab test results were pulled for analysis by clinical staff under direction of the chief medical officer."
The hospital added that there have been no cases of harm occurring to patients from the data mismatches.
iSoft is one of the main software suppliers to England's National Programme for IT [NPfIT].
Software bug mixes patient health data - Computerworld New Zealand