You may by now have had a leaflet through your door from NHS England about Care.data.
Care.data is a national programme that will increase the use of information from medical records with the intention of improving healthcare.
The dataset to be extracted from GP systems for the care.data service includes personal confidential data (PCD) such as referrals, all NHS prescriptions and other clinical data.
NHS England has made a commitment that personal confidential data will not be shared without explicit patient consent unless there is a legal basis or an overriding public interest in disclosure.
There is also a useful impartial and well balanced overview here on the patient.co.uk website.
If, after reading these, you wish to opt out of your data being shared, please let us know via reception and we will make a note on your records.