Box 12 Code W for Cafeteria Plan Vision Insurance?

My husband has vision insurance which is taken out of his paycheck pretax through a cafeteria plan. His work has coded the amount with code W in box 12. Is this correct? Turbo tax then wants him to give info on a HSA account but he doesn't have one. His employer says it is correct because it is done through a cafeteria plan and code W includes cafeteria plans.