Cornish offers three plans through Group Health Cooperative. Cornish is currently offering the following plans –Group Health Options Core/Base Plan, Group Health Options Plan (buy-up 1), and Group Health Alliant Plus (buy-up 2). The only difference between the last two plans, Group Health Options Plan and the Group Health Alliant Plus, is the provider network. Group Health Alliant Plus allows in-network access to Group Health, Virginia Mason, and Everett Clinic providers. There are several key differences between the Group Health Options Core/Base Plan and two buy-up plans. The Group Health Options Core/Base Plan has an annual deductible of $200 and a 10% coinsurance applied to services other than preventative office visits.