Supposedly there are some insurance companies that are herp friendly, but not many. I ran into a problem with my house insurance over 2 corn snakes. They consider any snake over 3 feet to be a potentially hazardous animal. So now I'll stick to 'short snakes' like kings and milks.
What gets me is that they weren't worried about me owning a Rhac leachianus who could easily bite off a chunk of flesh.