Individuals that wish to file a malpractice suit will likely require very specific documentation. First, they will need bills to show which procedures they were charged for, including additional procedures which resulted from the actions of the medical professionals.
Individuals must also obtain all medical records, from every medical professional that has seen them in the last several years. In addition, they should obtain all medical records for every specialist that has seen them for the issue which contributed to the malpractice allegations. For example, if the individual is attempting a malpractice suit against an endocrinologist, they should also obtain records form every doctor that has seen them for those specific issues, no matter how long ago.
Individuals that are attempting a malpractice suit should also obtain any evidence of the malpractice possible, including reports from other medical professionals.