The state-managed Charter Oak Health Plan will increase premiums for the second time this year on June 1 as part of Connecticut's effort to reduce its deficit. Charter Oak is managed by the state Department of Social Services, which increased premiums in response to "higher-than-anticipated medical costs." The program started easing its customers into price increases with a rate hike on Feb. 1. The lowest-income customers in the plan will pay 72% more in premiums next month than they did in January, the Hartford Courant reports.