The short answer to your question is that the hospital probably should have x-rayed your foot, but your case has some potential challenges. The biggest will be proving whether and how walking on it for four weeks made it worse. In a med mal case, you're only entitled to damages which result from the mistake. In your case, the mistake didn't cause you to have a broken ankle, it delayed your treatment. Without an earlier x-ray, it may be hard for an expert to differentiate the damage you did initially from the damage you may have done walking around on it.
In any event, the only way to know for sure is to gather you records (both from the ER and the new doctor after your MRI and surgery) and take them to a med mal lawyer to have them reviewed. You'll need copies of the MRI and x-ray too, so you might ask the MRI place to make you an extra while you're there-- most places will do it for free. I wish the best for a speedy recovery.
Answered on Mar 17th, 2012 at 12:14 PM