Up to 17% of patients diagnosed with diabetes do not know whether they have type 1 or 2, according to a Healthcare Commission report.
The commission carried out a survey of 68,500 diabetes patients across England last autumn.
It suggested that 90% of patients received annual check-ups on their condition in primary care but only 11% had attended an education course on diabetes and how to live with the condition.
The commission said it was important that people were aware which type of diabetes they had, due to the different care needs of the two conditions.
Visit www.healthcarecommission.org.uk for more information.