Clinical Investigation Specialists, Inc. (CIS), is a robust clinical research center with sites located between Chicago, IL and Milwaukee, WI. CIS has conducted Phases I-IV clinical studies for pharmaceutical and biotechnology companies (sponsors) since 1987.

Currently, we conduct clinical studies in five Illinois locations and one Wisconsin location with our in-house and affiliate physicians. We are always looking to expand our affiliate alliance of physicians and patient base in order to collaborate with top medical talent and to provide convenient patient access to cutting edge medicine available only through clinical study participation.

Our experienced clinical staff is fully engaged with patients and sponsor representatives.  They are responsive to inquiries and exhibit pro-active behavior that keeps study participants safe and study data accurate. 

CIS offers many benefits to potential study participants and sponsor companies.  Explore our website to learn more.


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