What if a plastic surgeon has illness that he gets amnesia and does not remember and he still operates people?

Shouldn't that be reported to some instance. I know a plastic surgeon who has severe amnesia or alzheimers and he still operates people. His staff does not want to report him anywhere even he continues to do unagreed procedures to patients and does not remember he did those. I think someone needs to stand up for the sake of human lives. Please let me know where this sort of thing can be reported? This is very sad and serious matter. Please help.

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