Published: Sep 07, 2011 8:02 PM EDT

WASHINGTON (AP) - A nationwide law enforcement crackdown has resulted in charges against 91 people - including doctors and other medical professionals for allegedly participating in Medicare fraud schemes involving $295 million in false billing.
    
Attorney General Eric Holder and Health and Human Services Secretary Kathleen Sebelius say charges were filed in Miami; Houston; Los Angeles; Chicago; Detroit; Baton Rouge, La.; and several other cities.
    
The attorney general said that those arrested are jeopardizing the integrity of the nation's health care system. Sebelius called the law enforcement initiative a powerful warning to those who would try to defraud taxpayers and Medicare beneficiaries.

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