What's the cost of diabetes in america?

About US$180 billion. Estimates like these are fraught with difficulties. Anyway you look at it the number is huge. Figure in prediabetes, gestational diabetes and undiagnosed diabetes and total cost is somewhere around $220 billion. Data from the american diabetic association national diabetes fact sheet.
$174 billion. Recent estimates put the total cost of diagnosed diabetes at $174 billion. Add on projected costs of undiagnosed diabetes and gestational diabetes and that rises to $218 billion.