HC Reform Update from Mark Sanna: As many as 1 in 3 American adults could have diabetes by 2050, federal officials said Friday in a new projection that represents a threefold increase. The CDC estimates that 1 in 10 have diabetes now, but the number could grow to 1 in 5 or even 1 in 3 by midcentury if current trends continue. The last estimate put the number at 39 million in 2050. The new estimate takes it to the range of 76 million to 100 million.