She says she is not aware that the 46-year-old controller has any past medical problems.
Chiang, a Democrat, serves as California's chief fiscal watchdog and has said the state will run out of money in February unless the governor and lawmakers act.
Earlier this year, he challenged Gov. Arnold Schwarzenegger's order to reduce state workers' pay to the federal minimum wage. That battle is still being fought in state court.
According to his biography, Chiang has a law degree from Georgetown University and began his career as a tax law specialist with the IRS.
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