A more thorough explanation:

A Qualified Medical Child Support Order (QMCSO) is a legal order issued by a court or state administrative agency that allows an alternate beneficiary, such as a child or stepchild of a participant, to be covered by the participant's group health plan. This order is made under the Employee Retirement Income Security Act (ERISA) and is a judgment or decree under state domestic relations law or other relevant state law that provides for child support or health benefits coverage for the child of a group health plan participant.

For example, if a divorced parent is required to provide health insurance for their child, a QMCSO can be issued to ensure that the child is covered under the parent's group health plan. This order establishes the child's right to receive benefits under the plan or assigns this right to an alternate beneficiary.

Another example is if a stepchild is living with a participant and the participant wants to provide health insurance for the stepchild. A QMCSO can be issued to allow the stepchild to be covered under the participant's group health plan.

Overall, a QMCSO is a legal tool that ensures that children and stepchildren of group health plan participants receive the health benefits they are entitled to.