Is it illegal to drop a wife from health insurance if you are not divorced?

In the United States, group health insurance plans offered through employers are generally governed by the federal Employee Retirement Income Security Act (ERISA). Under ERISA, an employee who is the policyholder of a group health insurance plan can generally make changes to the plan, such as adding or dropping dependents, as long as the changes are made in accordance with the plan's terms and conditions.

However, some states have laws that protect the rights of spouses and dependents to continued health insurance coverage even in the event of a separation or divorce. For example, in California, a spouse's right to continued health insurance coverage may continue for up to one year after a separation, and even longer if the spouse qualifies for COBRA continuation coverage.

Therefore, whether it is illegal to drop a wife from health insurance if you are not divorced depends on the specific circumstances and laws of the jurisdiction in which you reside. It is important to consult with a legal professional to obtain accurate advice regarding your specific situation.