They might be. If your employer will offer health insurance in 2014—and the insurance covers dependents—your grandchild might be eligible for coverage.
Insurance plans have certain ways of defining a grandchild as a dependent. For example, the plan may require you to list your grandchild as a dependent on your income tax returns.
If you have questions, contact your employer or call the Health Insurance Marketplace at 1-800-318-2596.