UnitedHealth Group Inc. will gain access to "vast amounts of data" on how rival insurers do business if its proposed acquisition of Change Healthcare Inc. goes through, the Justice Department said opening arguments in a trial challenging the deal.

JP Morgan upstarts a health plan devoted to making care more affordable by investing $30 million in Centivo.

The measure of spending on health care drops from last year and there is plenty of room for growth in Optum Health.

The purchase of LHC Group will "enhance the reach of Optum's value-based capabilities along the full continuum of care."

A lawsuit filed by the DOJ argues that the purchase would give UnitedHealth access to vast amounts of competitively sensitive data about rivals.

Private insurers say they need more evidence that the treatment actually slows the rate at which Alzheimer's patients deteriorate.

Centene has agreed to pay more than $200 million to resolve claims in four states and expects more to come.

Bright Heath's market debut caps a string of public listings of new health care businesses, including insurers and primary-care companies.