It may or it may not. Before travelling, be sure to read your group plan benefits booklet/contract to learn about the existing travel coverage you may have through your employer's plan. If you're unable to find those documents, your human resources department should be able to assist you. If your plan does offer travel protection, be aware of possible coverage limitations (such as benefit limits, number of days away, age limits, coverage exclusions) and coverage that may not be included (such as trip cancellation, trip interruption, or lost baggage).
If you need additional coverage, they can offer you options to top up your group coverage by phone before you leave on your trip and may be able to offer you coverage that's not available through your group plan.