775 ILCS 5/5-102.1: No Civil Rights Violation: Public Accommodations.

(a) It is not a civil rights violation for a medical, dental, or other health care professional or a private professional service provider such as a lawyer, accountant, or insurance agent to refer or refuse to treat or provide services to an individual in a protected class for any non-discriminatory reason if, in the normal course of his or her operations or business, the professional would for the same reason refer or refuse to treat or provide services to an individual who is not in the protected class of the individual who seeks or requires the same or similar treatment or services.

(b) With respect to a place of public accommodation defined in paragraph (11) of Section 5-101, the exercise of free speech, free expression, free exercise of religion or expression of religiously based views by any individual or group of individuals that is protected under the First Amendment to the United States Constitution or under Section 3 of Article I, or Section 4 of Article I, of the Illinois Constitution, shall not be a civil rights violation.