A lawsuit filed against Cigna is the fourth attempt to force insurers to drop a mandatory mail-order drug program said to discriminate against people with HIV/AIDS.

South Florida-based plaintiffs law firm Podhurst Orseck is co-counsel for the potential class action brought by Consumer Watchdog. The nonprofit consumer advocate teamed with the national health care firm Whatley Kallas, which is co-counsel in the Cigna case, for lawsuits targeting United Healthcare Insurance Co., Anthem Insurance Cos. Inc. and Aetna Inc.