UnitedHealth Group approached Aetna about a merger in recent days, the Wall Street Journal reports. UnitedHealth, the largest health insurance company in the U.S., sent a letter to Aetna expressing its interest. However, the newspaper reports "it is far from certain there will be any deal between the companies."

Speaking at the Group of Seven summit on June 8, President Barack Obama said the Supreme Court should not have agreed to hear the King v. Burwell case. The decision, which could affect health insurance marketplaces in 34 states, is expected later this month.

After the federal government released Medicare payment data on June 3, doctors defended and explained their practices. The data did not include information on whether the treatments worked or the disease levels of patients and did not factor in overhead costs that vary among physicians.

The expansion of Medicaid in some states has not helped hospitals' operating margins or cash flow, according to a Moody’s Investors Service report.

Plans on the health insurance exchanges are expected to cost more in 2016, according to proposed rates from insurers. The exchanges were created as part of the Patient Protection and Affordable Care Act. Insurers were required to post any proposed increases above 10 percent online by June 1.

A report from the Government Accountability Office (GAO) concluded that the Medicare fee schedule may be flawed because the American Medical Association does not collect accurate payment data. The GAO also cited concerns about doctors setting the Medicare rates.

Administrative costs for private health insurance plans and the federal government are expected to increase $270 billion in the next decade. This year, overhead costs are expected to account for 45 percent of all federal spending related to the Patient Protection and Affordable Care Act.

CFOs are concerned with the "Cadillac tax" companies will have to pay starting in 2018 for offering high-cost health insurance plans.