215 ILCS 5/364
Discrimination between individuals of the same class of risk in the issuance of its policies or in the amount of premiums or rates charged for any insurance covered by this article, or in the benefits payable thereon, or in any of the terms or conditions of such policy, or in any other manner whatsoever is prohibited. Nothing in this provision shall prohibit an insurer from providing incentives for insureds to utilize the services of a particular hospital or person. It is hereby expressly provided that whenever the terms "physician" or "doctor" appear or are used in any way in any policy of accident or health insurance issued in this state, said terms shall include within their meaning persons licensed to practice dentistry under the Illinois Dental Practice Act with regard to benefits payable for services performed by a person so licensed, which such services are within the coverage provided by the particular policy or contract of insurance and are within the professional services authorized to be performed by such person under and in accordance with the said Act.
No company, in any policy of accident or health insurance issued in this State, shall make or permit any distinction or discrimination against individuals solely because of the individuals' disabilities in the amount of payment of premiums or rates charged for policies of insurance, in the amount of any dividends or other benefits payable thereon, or in any other terms and conditions of the contract it makes, except where the distinction or discrimination is based on sound actuarial principles or is related to actual or reasonably anticipated experience.
No company shall refuse to insure, or refuse to continue to insure, or limit the amount or extent or kind of coverage available to an individual, or charge an individual a different rate for the same coverage solely because of blindness or partial blindness. With respect to all other conditions, including the underlying cause of the blindness or partial blindness, persons who are blind or partially blind shall be subject to the same standards of sound actuarial principles or actual or reasonably anticipated experience as are sighted persons. Refusal to insure includes denial by an insurer of disability insurance coverage on the grounds that the policy defines "disability" as being presumed in the event that the insured loses his or her eyesight.
215 ILCS 5/364