An incomplete evacuation by D&C does not infer malpractice. If the problem is cured by a repeat D&C, there is nothing there worth suing about. This...

If I wanted to do either a malpractice or a wrongful death claim for my dad, will i have to include his wife in the lawsuit?

In the unlikely event that your father left a Will that cuts your stepmother out, AND they were not married when he died, then you MIGHT be able to...