Mealey's (December 19, 2019, 1:39 PM EST) -- WASHINGTON, D.C. — In supplemental briefs filed Dec. 16 at the direction of the District of Columbia Circuit U.S. Court of Appeals, a health insurance provider and a group of policyholders that sued it over a 2015 data breach both opine that a trial court properly certified a partial dismissal ruling for appeal under Federal Rule of Civil Procedure 54(b) (Chantal Attias, et al. v. CareFirst Inc., et al., No. 19-7020, D.C. Cir.)....