So, do you have other insurance that will pay for expensive & timely treatments in an emergency? If not, perhaps you'd like to leave a note in this thread http://www.scubaboard.com/forums/accidents-incidents/123910-if-i-should-die-while-diving.html saying that it's okay if you couldn't afford treatment to prevent your death or crippling disability with loss of bowel movement control should the need arise and not be met - just for future references....
Insurance doesn't save lives or prevent accidents. Lack of insurance doesn't exclude you from life-saving treatment. Even DAN will assist non-members. It will just cost a lot.