Wis. Stat. § 635.01: Scope.

This chapter applies to all group health insurance plans, policies or certificates, written on risks or operations in this state, providing coverage for employees of a small employer, or employees of a small employer and the employer, and to individual health insurance policies, written on risks or operations in this state, providing coverage for employees of a small employer, or employees of a small employer and the employer when 3 or more are sold to or through a small employer.