The federal judge overseeing litigation targeting Anthem Inc. with data breach claims on Thursday continued her grilling of plaintiffs lawyers who represent the health insurer’s customers about the number of firms who worked on the case.

U.S. District Judge Lucy Koh asked lead plaintiffs counsel, Eve Cervantez of Altshuler Berzon and Andrew Friedman of Cohen Milstein Sellers & Toll, a string of detailed questions about which lawyers submitted bills on work settling the litigation, who defended depositions of name plaintiffs and who handled basic discovery tasks. Koh previously grilled the lead plaintiffs for having 49 other firms beyond those on the four-firm plaintiff steering committee she appointed.