WASHINGTON — The Justice Department on Thursday sued to block a $13 billion acquisition of a health technology company by a subsidiary of UnitedHealth Group, in the latest move by the Biden administration to clamp down on corporate consolidation.The agency argued that a deal by UnitedHealth to buy the health tech firm Change Healthcare would give UnitedHealth sensitive data that it could wield against its competitors in the insurance business. The suit was filed in the U.S. District Court for the District of Columbia.A spokeswoman for Optum, the UnitedHealth subsidiary, said in a statement that the Justice Department’s “deeply flawed position is based on highly speculative theories that do not reflect the realities of the health care system,” and added that the …
