NY Times article
here.

Clarence W. Kendall, a rancher in Pearce, Ariz., was moving bales
on top of a haystack when he fell eight feet and struck his head on the corner
of a truck below. His health insurance covered most of the cost of treating the
head trauma caused by the accident.

But there was one bill, for $47,182, that his insurance did not pay.

It came from the company that transported Mr. Kendall in a helicopter ambulance
to a hospital in Tucson on the day of the fall, nearly two years ago. “That
initial bill nearly gave me a heart attack,” he said. “I thought they’d have to
come and get me again.” Mr. Kendall has not paid the charge, which he said was
equivalent to a year’s income. As a result, Air Methods, the nation’s largest
air ambulance operator, with over $1 billion in revenue last year, is suing him.