With WSLH Proficiency Testing, you receive reliable, affordable, and easy-to-use laboratory proficiency testing products with rapid access to results. Connect with our dedicated team to request a quote anytime.

We are your proficiency testing provider, backed by a national public health lab and a Big Ten university. Our unique affiliations give you the educational resources and support you need for successful proficiency testing.

WSLH Proficiency Testing, building a solid foundation for clinical laboratory improvement since 1966. WSLH PT is approved by CMS, and accepted by CAP, COLA, and The Joint Commission. Learn more at wslhpt.org.