Many folks that have a burst appendix spend at least a week in the hospital, usually getting abdominal "lavage". Basically, lots of iv medicine, abdominal treatments where they pump fluids into the abdomen to wash it out, and LOTS of medical bills.
Diagnosis is not always so straight forward: My wife (many years ago) went to the hospital for appendicitis when she was just 18. When she went in, she told them she thought she had appendicitis. After two days of pain and blood work and accusing her of being pregnant, they finally concluded that she was going to die if they didn't decide on the obvious. Up until they did a rough pelvic exam on her, she could prove that she couldn't have gotten pregnant in the normal way. It still gets her mad today to think about that moron doctor.
I'll never run out of horror stories about the medico's...