WASHINGTON, June 1 (Reuters) - The U.S. Supreme Court on Thursday gave a boost to whistleblowers in their bid to revive lawsuits accusing pharmacy operators of knowingly overbilling government health insurance programs for prescription drugs at taxpayers' expense. Whistleblower advocacy groups as well as a number of states had said a Supreme Court ruling against the whistleblowers would make it easier for fraudsters to evade accountability for filing false claims to the government and risked undermining state-administered Medicaid programs. They also said both companies knew they were defrauding the government and worked to conceal their pricing practices. President Joe Biden's administration backed the whistleblowers in their appeal to the Supreme Court. Lawyers for the administration urged the justices to reverse the 7th Circuit, saying the ruling undermined the False Claims Act.

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Persons: Clarence Thomas, Thomas Proctor, Tracy Schutte, Michael Yarberry, SuperValu, Joe Biden's, John Kruzel, Will Dunham Organizations: U.S, Supreme, Safeway Inc, Albertsons Companies Inc, SuperValu Inc, United Natural Foods Inc, Government, Conservative, Safeway, Circuit, Lawyers, Thomson Locations: Chicago