Join us in celebrating our 50th Anniversary!
Join us in celebrating our 50th Anniversary!

Contact CLSI: Get in Touch with Us Today

We’d be happy to speak with you more about our products, programs, membership, and mission.

CLSI Address

Clinical and Laboratory Standards Institute
950 West Valley Road, Suite 2500
Wayne, PA 19087 USA

Please send payments to:

CLINICAL AND LABORATORY STANDARDS INSTITUTE
PO Box 645766
PITTSBURGH, PA 15264-5255

Please send overnight courier payments to:

PNC Bank C/O CLINICAL AND LABORATORY STANDARDS INSTITUTE
Lockbox Number 645766
500 1ST AVE
PITTSBURG, PA 15219

Phone Numbers

P: +1.610.688.0100
F: +1.610.688.0700
Toll Free (US): 877.447.1888
Customer Service phone hours
8:30 AM–5:00 PM Eastern (US) Time

E-mail Us

Membership

membership@clsi.org


Customer Service, Orders, and General Questions

customerservice@clsi.org


Web Assistance

webmaster@clsi.org


Technical Questions

If you have technical questions regarding the content of CLSI standards and guidelines, please e-mail standard@clsi.org.