Belleville, Ill., psychiatrist Ajit Trikha pleaded guilty in June to defrauding Medicare and Medicaid of at least $1.85 million, including invoices claiming he worked more than 24 hours a day on 76 different occasions (40 hours on one day and treating 83 patients in 2 1/2 hours on another). He also claimed to treat patients 1,267 times in Belleville while he was traveling in Europe.

In June, the New York state comptroller charged Brooklyn dentist Mohinder Mayell with defrauding Medicaid of at least $124,000, including claims for treating eight patients between 123 and 170 times each and filling 52 cavities in another patient in about two hours' time.

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