WASHINGTON--Americans living with undiagnosed diabetes incur an estimated $18 billion in health care expenditures each year, or $2,864 per person in medical services and lost productivity from diabetes-related complications, according to a new study by the National Changing Diabetes Program published in the journal Population Health Management.
 
Undiagnosed diabetes represents 8.3 percent of the $218 billion cost of diabetes and pre-diabetes estimated for 2007. "For the first time we are beginning to get a sense of the total economic burden of diabetes to our health care system and economy," said Timothy Dall of health care consulting firm The Lewin Group, which conducted the study. "The cost is particularly astonishing, given that a significant number of diabetes cases and related complications are largely preventable."
 
About 25 percent of the 23.6 million Americans living with diabetes are not aware that they have the disease, according to the study. Data also show the prevalence of undiagnosed diabetes increased with age (until age 70) and was more common in men.
  
The cost of diagnosed diabetes was estimated at $174 billion in 2007. Pre-diabetes was associated with $25 billion in health care expenditures, and gestational diabetes resulted in $623 million in costs.