UnitedHealth chased a 35 percent profit hike in last year's first quarter with a 31 percent jump in the first three months of 2018 by adding customers and improving its growing operations outside insurance.
The nation's largest health insurer also boosted its forecast for 2018 Tuesday after a surprisingly strong start to the year.
UnitedHealth was among the largest gainers on the S&P 500 in early trading.
UnitedHealth added customers for its Medicare Advantage and Medicaid businesses and stretched its reach into South America by buying a health care provider and insurer that operates in Chile, Columbia and Peru.
The insurer also saw its provision for...