WASHINGTON (CNN) - Wal-Mart and Rite Aid agreed to pay millions of dollars to settle separate suits alleging the firms submitted false prescription claims to government health insurance programs, the Justice Department announced Friday.

Wal-Mart Stores agreed to pay $2.8 million to settle allegations some of its pharmacies dispensed partial or "short" prescriptions due to insufficient stock, but billed Medicaid and other programs for the full quantities prescribed.

A whistleblower in South Carolina who brought the Wal-Mart case will receive more than $95,000 the department said.

Rite Aid agreed to pay $7 million to settle allegations that drugs were never delivered to beneficiaries of the government health care programs, and were later returned to the pharmacies' stock.

A Philadelphia whistleblower will receive slightly more than $1 million for successfully bringing the Rite Aid suit, which allowed the government to recover several times that amount.

In a statement, Wal-Mart said that "the practices at issue were used throughout the industry."

Friday's announcement "is a formal acknowledgement of the settlement and the changes Wal-Mart has already made to handling and billing practices regarding prescriptions that cannot be filled all at once," the statement said.

Wal-Mart (WMT: Research, Estimates) stock edged lower on the New York Stock Exchange. Rite Aid (RAD: Research, Estimates) ended unchanged, also on the Big Board.