The agency didn't identify the 28-year-old man but says he's a crewmember of the 150-foot Wizard, part of the popular Discovery Channel show. Discovery didn't immediately provide information.
Coast Guard officials say a helicopter crew flew the man Monday afternoon to a clinic in the Alaska Peninsula community of Cold Bay, 60 miles to the south. He was then flown to an Anchorage hospital.
Waves were only about 3-feet high when he fell ill. The National Weather Service says it occurred before the arrival of a huge storm brewing in the Bering Sea.