Illinois Statutes Chapter 215. Insurance § 161/30. Suppliers; optical labs

(a) A vision care organization may not restrict or limit an eye care provider's choice of suppliers of services, covered materials, or the use of an optical lab.

(b) A vision care organization may not require an eye care provider or patient to order or purchase covered materials, including, but not limited to, ophthalmic lenses, from any source owned by, controlled by, or in a common ownership scheme with the entity that issued the vision care plan.

(c) At the request of an enrollee, an eye care provider recommending an out-of-network source or supplier of vision care materials to an enrollee shall provide written notice to the enrollee stating:

(d) An eye care provider is required to offer an enrollee in-network sources or suppliers of vision care materials at the enrollee's request.