I didn't row over to the island myself...just read the comments here, but did the DUmmy OP ever state what the ER trip was for? Maybe it WASN'T life threatening.
And I've never had an ER trip turned down...of course, I have only been to the ER 6 times in the past 16 years.
Actually, come to think of it, I've never had an insurance claim for medical care turned down.