Older docs don't have to take board exams every ten years. Incoming doctors all have to take board exams every 10 years for the rest of their working life. Th

Older docs don't have to take board exams every ten years. Incoming doctors all have to take board exams every 10 years for the rest of their working life. This may account for why high volume doctors don't have the higher mortality rate even for older physicians. Perhaps the higher volume makes them more likely to be current in their field.