Congressional investigators found that Charles B. Nemeroff, the head of psychiatry at the School of Medicine, failed to disclose to the University at least $1.2 million in income from pharmaceutical companies from 2000 to 2007.

The case, which Emory officials are investigating, involves the highest-profile doctor to come under congressional scrutiny for alleged conflicts of interest. Such conflicts have led many medical schools to reevaluate their relationships with drug makers, and lawmakers such as Sen. Charles Grassley (R-Iowa) have delved into several cases from doctors at other universities. Grassley also leads this inquiry into Nemeroff's undisclosed income.

An Emory spokesman told the New York Times that the University was looking into Grassley's observations, and that Nemeroff said he thought he had followed University regulations for disclosure.

Nemeroff, a prolific writer and noted researcher, has voluntarily stepped down from his administrative post at the School of Medicine, the University said yesterday.

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