Figures from the Scottish Clinical Information Management in Practice advisory group showed that the ECS system now contains 5,300,000 patient records. Only 1,400 - 0.02 per cent of the total - have chosen to opt out.
The system allows out- of-hours providers, A&E departments and the NHS24 phone service to access a summary of patients' medical histories during diagnosis and treatment.
Only 2 per cent of Scottish practices have yet to upload records to the ECS system.
A spokesman for NHS IT agency Connecting for Health said that comparable figures would not be available for England until 'well into' the national roll-out of the summary care record system.
The NAO has said that that is unlikely to be until 2014 at the earliest.
Comment below and tell us what you think