Contact CLSI: Get in Touch with Us Today
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Mailing Address
Clinical and Laboratory Standards Institute
PO Box 334
Malvern, PA 19355
Office Address
Clinical and Laboratory Standards Institute
1055 Westlakes Drive, Suite 300
Berwyn, PA 19312
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
PITTSBURGH, 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