Default enrollment when employee loses option eligibility

Summary

Default enrollment when employee loses option eligibility

Content

We have multiple medical plans with the following options:

• Employee Only
• Employee & Spouse
• Employee & Children
• Employee & Family

If an employee is enrolled in the Employee & Family plan, and they lose eligibility because the last child ages out, we are able to detect that Loss of Eligibility event and remove the ineligible child and de-enroll the employee from the Employee & Family option (Since they no longer have the required eligible dependents for this option). How are others handling the situation where you still want the employee to remain in the same plan and cover the other eligible dependents (i.e. Employee & Spouse coverage)? I've looked at the default enrollment formula as an option, but I don't