Those doctors sent letters to patients saying they no longer will be able to accept Cigna insurance as of Aug. 8. In the letter, doctors say they believe Cigna is canceling coverage to pressure John C. Lincoln hospitals to negotiate a new contract with the insurer.
The two sides also are at odds over whether John C. Lincoln doctors are referring patients outside Cigna's circle to Lincoln's two Phoenix hospitals.
It's unclear how long Cigna and the network have been without a contract. Cigna says it's been eight years, while Lincoln officials say it's been more than 20.