A “growing obesity crisis” has led to nearly two million people in England being exposed to the condition that causes the level of sugar in the blood to become too high.
As part of efforts to tackle the problem, a radical new liquid diet will be available on the NHS to put type 2 diabetes into remission.
This will be followed by a further nine months of support to help them maintain weight loss.
According to new NHS figures, there are 1,969,610 patients registered with a GP who have non-diabetic hyperglycaemia, a condition that puts people at risk of type 2 diabetes.
The health service warned the problem could become greater still due to the rise in obesity levels.
Projections indicate the growing number of diabetes sufferers could lead to 39,000 extra people suffering a heart attack in 2035 and more than 50,000 experiencing a stroke.
One in six hospital beds are now occupied by someone with diabetes, the NHS said.
The most common form of diabetes, type 2 is caused by problems with how the insulin hormone breaks down glucose in the body
The lifelong condition can cause excessive thirst, a need to frequently urinate and tiredness.
It can also increase the risk of serious problems with eyes, heart and nerves, and is often linked to being overweight or inactive.
According to the NHS, there were over a million obesity diagnoses in hospital admissions last year, up from 884,000 the year before.
The NHS’s world-first diabetes prevention programme is doubling its capacity to prevent people developing the condition.
The programme identifies people at high risk of diabetes and supports them to live healthier lives and stop or delay the onset of illness through courses that last between nine and 12 months.
It has received around half a million referrals, with patients so far losing a combined weight of 43 ambulances.
NHS chief executive Simon Stevens warned that “bulging waistlines” were leading to the rise in people living with type 2.
He added: “Unless many more of us make a change, obesity-related illnesses will end up costing hundreds of thousands more lives and billions of pounds in higher treatment costs.”
Professor Jonathan Valabhji, NHS national clinical director for obesity and diabetes, said the “stark figures” also showed the problem was not limited to the middle aged or elderly people, with about 115,000 younger people suffering type 2 or at risk of developing the condition.