The $69 billion merger of CVS Health and Aetna will proceed after the Hartford-based insurance giant sells off its Medicare Part D prescription drug plan businesses for individuals. The Department of Justice made the announcement Wednesday requiring the Medicare Part D divestiture in order for the deal to go through.

The Justice Department said the proposed divestiture to WellCare Health Plans Inc., an experienced health insurer dealing with government-sponsored health plans, including Medicare D individual prescription drug plans, was needed to resolve competitive questions.