Roche Diagnostics claims in a new lawsuit that its glucose test strips for diabetes patients were at the center of an $87 million insurance fraud scheme carried out by a Utah company.

The suit filed in Newark federal court Tuesday names six former officers and directors of Alliance Medical Holdings as defendants, as well as a series of affiliate companies that allegedly financed Alliance’s fraudulent activities—Hughes & Company Investment Partners and the Pritzker Group, both of Chicago, and Mercato Partners of Cottonwood Heights, Utah. Also named as a defendant is Zions Bancorporation of Salt Lake City. Those companies allegedly knew of and approved the fraudulent scheme, the suit claims.