The founding owners of Hill Physicians Medical Group's management company, PriMed Management Consulting Services, are selling their stakes to a group of new and existing investors, including Anthem Blue Cross of California, Blue Shield of California, Dignity Health and the medical group itself. Current CEO Darryl Cardoza and retired former CEO Steve McDermott, sold their shares in the privately held entity for an undisclosed amount, officials told me. Dignity and Hill were previous investors;…