The Congressional Budget Office on Tuesday quietly raised the 10-year cost of ObamaCare's insurance subsidies offered via the health law's exchanges by $233 billion, according to a Congressional Budget Office review of its latest spending forecast.

The CBO's new baseline estimate shows that ObamaCare subsidies offered through the insurance exchanges — which are supposed to be up and running by next January — will total more than $1 trillion through 2022, up from $814 billion over those same years in its budget forecast made a year ago. That's an increase of nearly 29%.

The CBO upped the 10-year subsidy cost by $32 billion since just last August.