The personal information of 284 diabetic patients was shared with more than 30 others as a result of a data breach at NHS Highland.
The mistake caused the patients' names, birthdates, contact information, and hospital identification numbers to become public.
The data had been entered into a spreadsheet along with notes about when patients attended or received training.
The next day, NHS Highland reported the issue to the Information Commissioner's Office (ICO), and it has written to those patients who were impacted.
No private information about medical history was disclosed.
"id": "NHS213011623",
"linkid": "nhs-highland",
"type": "Data Leak",
"date": "11/2020",
"severity": "25",
"impact": "2",
"explanation": "Attack limited on finance or reputation"