That compared with earnings from operations of $225 million in the year-earlier quarter on revenue of $10.9 billion.
"We are pleased with the strong second quarter performance across our product lines," said CEO Michael Neidorff. "The marketplace business continues to be particularly strong, confirming our business as usual approach."
Membership ballooned by 788,300 enrollees to 12.2 million in the quarter fueled by a surge in exchange business, the company said in Tuesday's earnings release.
Its medical loss ratio, or the percentage of premium dollars used for care, touched 86.3% in the quarter compared to 86.6% in the prior-year quarter.
Centene has big growth plans for Nevada. This month its Nevada subsidiary, SilverSummit Healthplan, began serving Medicaid recipients enrolled in Nevada's Medicaid managed care program, the company said