UnitedHealth to Buy Medical Group in Sign Optum’s Still Growing

UnitedHealth Group Inc. plans to acquire a 45-doctor medical practice in Massachusetts in a sign that its Optum division will keep adding doctors despite turmoil in the business.

The company’s Atrius Health affiliate has agreed to buy a Boston-area primary care group called Acton Medical Associates, PC, according to a notice posted by a Massachusetts regulator.

The deal shows UnitedHealth continues to expand its reach in primary care and physician groups even as that part of its business has struggled. Physician groups are part of its sprawling Optum Health business, where executives said earnings were $6.6 billion below expectations in ...