Contact Us

Business Hours
Monday to Friday, 8:30 am to 5:00 pm, Eastern

National Blood Clot Alliance
8321 Old Courthouse Road, Suite 255
Vienna, VA  22182

Email: info@stoptheclot.org
Phone: 703.935.8845
Toll Free: 877.4.NO.CLOT

More Ways to Contact the National Blood Clot Alliance

Sign up for NBCA’s mailing list to receive news and updates concerning prevention, treatment, education and advocacy about blood clots and clotting disorders. Find out about NBCA-sponsored events and volunteer opportunities.

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Current News

Take Control of Your Health & Take Steps to Prevent Blood Clots

Take Control of Your Health During National Women’s Health Week There are more than 60 million women of child-bearing age…

Now Enrolling: C-TRACT Study

A new NIH-sponsored study – the Chronic Venous Thrombosis: Relief with Adjunctive Catheter-Directed Therapy study, or C-TRACT study – is…