FILE PHOTO: Logos of CVS and Aetna are displayed on a monitor above the floor of the New York Stock Exchange shortly after the opening bell in New York, U.S., December 5, 2017. REUTERS/Lucas Jackson

WASHINGTON (Reuters) - The U.S. Justice Department's antitrust review of CVS Health Corp's CVS.N planned purchase of Aetna Inc AET.N may conclude soon, a source familiar with the review said on Monday.

That said, arranging divestitures needed to resolve antitrust concerns in the proposed transaction takes time and it is not clear that possible approval will come in September, said the source.

The $69 billion deal was announced in December.