Concordia university Chicago is black listed?

Yes, Concordia College and University, Chicago is a blacklisted college. Some other blacklisted colleges in USA include:
American Central University Wyoming

American Century University New Mexico

American Coastline University

American University of Hawaii

Ames Christian University Florida

LaSalle University Louisiana

Life Christian University Tampa, Florida

Louisiana Baptist University Louisiana

Louisiana Christian University Lake Charles, Louisiana

Madison University Gulfport, Mississippi

University of North America

University of Northern Virginia

Columbia State University

University of Beverly Hills

Tennessee Christian University

Washington International University

While this is a huge list it still does not include all possible blacklisted colleges. But here’s how you can avoid getting into a blacklisted college:
Do extensive research about the college

Go through different study abroad guides

Try reaching out to the graduated students of the respective college

Make the best use of the Internet to find sources that support the authenticity of the college

Let me know if there is anything else you need help with.