The terms of the settlement release that you signed in exchange for the check you received dictate whether you are responsible. Oftentimes the insurance company will require you to pay all outstanding bills out of any settlement, and will require you to reimburse them if you fail to do so. In addition, it is your responsibility to reimburse Medicare for any benefits it may have paid on your behalf. In the event your own health insurance provider paid benefits on your behalf, you may have an...