The lawsuits argue that the Blue Cross Blue Shield system of allocating exclusive territories reduces competition and forces hospitals and doctors to accept lower rates.
The contract at issue is mainly for people with health insurance through their employers. Cigna's Medicare Advantage plans, such as Bravo and HealthSpring, remain in-network at Jefferson.
Prospect's bankruptcy motion for the closure of Crozer-Chester Medical Center and Taylor Hospital did not set a closure date, but said Prospect cannot fund operations beyond March 14.
The changes at Spark follow Roche's decision last year to halt development of a gene therapy for hemophilia A that was the main asset at Spark when Roche acquired it and related layoffs.
Bankrupt Prospect Medical Holdings and officials with the Pennsylvania attorney general's office negotiated through the weekend, but were unable to reach a deal, a Prospect attorney said.