The board of Covered California voted unanimously against allowing insurers on the exchange to extend cancelled plans. Their decision only affects the 11 managed care companies on the state-built exchange, including WellPoint's Anthem Blue Cross, Kaiser Permanente, Blue Shield, and Health Net.
In its decision the board said there would be no benefit to the consumer and may create confusion about accessing affordable health care coverage through Covered California.
(Read more: California rejects Obamacare fix for canceled plans)
It added that maintaining the original deadline confirms the state exchange's commitment to transitioning Californians into plans that are compliant with the reforms of the Patient Protection and Affordable Care Act, protecting consumers from double deductibles and stabilizing the risk pool to control costs for consumers beginning in 2014.
"The consumer is front and foremost in Covered California's policy decision process. These new strategies will provide consumers a better enrollment experience, more flexibility in the selection of a plan and, most importantly, increased knowledge with which to make the best health coverage choice possible," Covered California Executive Director Peter V. Lee, said in a press release.