what all degrees do you need to be a medical examiner

Often ( but not always) medical examiners are physicians who have complete training in pathology which and often a sub specialty in forensic pathology ( which is the specialty that deals with determine why someone died. The training involves 4 years of college, 4 years of medical school, a pathology residency that lasts 4 years and then an additional year of training in forensic pathology. In some places ( small towns etc) the medical examiner may not have this type of rigorous training and may be a doctor who is not a specialist in performing autopsies and determining the cause of death. This would not likely be a full time job in those areas however. The type medical examiner made popular by TV shows and such has the complete trailing I mentioned above.