Contact Us

The Union of Concerned Scientists maintains offices across the United States. Get in touch by phone or mail (listed below), via Facebook or Twitter, or by submitting one of our contact forms.

Media queries can be submitted to our press contacts, listed here.

Member and donation inquiries can be directed to [email protected] or to our Member Line, (800) 666-8276.

Contact forms

National headquarters

Two Brattle Square
Cambridge, MA 02138-3780
Phone: (617) 547-5552
Fax: (617) 864-9405

Washington, D.C., office

1825 K St. NW, Suite 800
Washington, D.C. 20006-1232
Phone: (202) 223-6133
Fax: (202) 223-6162

West Coast office

500 12th St., Suite 340
Oakland, CA 94607-4087
Phone: (510) 843-1872
Fax: (510) 451-3785

Midwest office

One N. LaSalle St., Suite 1904
Chicago, IL 60602-4064
Phone: (312) 578-1750
Fax: (312) 741-9650

Machine-readable files are available in response to the federal Transparency in Coverage Rule and includes negotiated service rates and out-of-network allowed amounts between health plans and healthcare providers. The machine readable files are formatted to allow researchers, regulators, and application developers to more easily access and analyze data.