A husband and wife are insured under group health insurance plans at their own places of employment, and as dependents under their spouse's coverage. If one of them incurs hospital expenses, how will those expenses likely be paid?

Benefits will be coordinated.

Explanation:

Since in the question, it is given that both husband and wife are insured under group health insurance plans and it is also under spouse coverage

Now if one of them incurred the expenses so the expenses which are to be incurred are to pay based on the benefits that are coordinated as if an individual covered in two or more plans so it is would be paid as benefits coordination and the same is to be considered in a couple.