You can contact the Benefits Service Center at 1-877-860-7526 from 9:00 a.m. to 5:00 p.m. ET Monday through Friday or through Chat With Us on the Benefits Service Center portal. Health Pros are also available to assist with tough issues like claims and billing disputes. Questions About Coverage? Start by contacting the insurance carrier directly. They know their coverage rules best. If you enrolled in a Bronze Plus medical coverage level, check out the HSA User's Guide (PDF) for additional contacts during the year.