The companies argue the commissioners have "a lengthy track record of making public statements that indicate serious bias" against pharmacy benefit managers.

NEW YORK (Reuters) -CVS Health, UnitedHealth Group and Cigna have asked U.S. Federal Trade Commission chair Lina Khan and commissioners Rebecca Kelly Slaughter and Alvaro Bedoya to disqualify themselves from an FTC lawsuit that has accused the companies of unlawfully inflating insulin prices.

The FTC has accused units of CVS, Cigna and UnitedHealth of unfair trade practices in how they managed insulin prescriptions.