For sample questions please contact your state diagnostic lab Find your state lab
For all other question, contact the specific regional center or committee
Regional Centers
Great Plains Plant Diagnostic Network gpdn@npdn.org 
North Central Plant Diagnostic Network ncpdn@npdn.org 
Northeast Plant Diagnostic Network nepdn@npdn.org 
Southern Plant Diagnostic Network spdn@npdn.org 
Western Plant Diagnostic Network wpdn@npdn.org 
Center for Environmental and Regulatory Information Systems ceris@npdn.org 
NPDN IT support it@npdn.org 
Committees
National Data Committee data@npdn.org 
Accreditation Committee accreditation@npdn.org 
Professional Development Committee prof_dev@npdn.org 
Protocols & Validation Committee protocols@npdn.org 
Proficiency Committee proficiency@npdn.org 
Outreach & Extension Committee outreach@npdn.org 
Online Communications Committee communications@npdn.org 
Regulatory Relations Committee regulatory@npdn.org 
LIMS Technical Committee lims@npdn.org 
Programs
NPDN Communicator newsletter editor newsletter_editor@npdn.org 
Beltsville Workshops Program beltsville_workshops@npdn.org
Star-D Accreditation Program stard@npdn.org
GPDN Webinars Coordinators gpdn_webinars@npdn.org
NPDN National Program coordination directors@npdn.org