WSLH Proficiency Testing Information

When you partner with WSLH Proficiency Testing (WSLH PT), you receive reliable, affordable, and easy-to-use proficiency testing products with rapid access to results. Backed by a national public health lab and a Big Ten university, WSLH PT acts as an extension of your lab, providing the hands-on support and educational resources you need to stay compliant without the added stress. Your Lab. Our Mission. Established in 1966 by the Wisconsin State Laboratory of Hygiene, WSLH PT continues to provide a solid foundation for clinical laboratory improvement in all 50 states and around the world. As an affiliate of the University of Wisconsin-Madison School of Medicine and Public Health, our work is grounded in a shared mission to improve the human condition through scientific excellence. Whether we are your primary or secondary PT provider, our team of dedicated Medical Technologists is here to help your lab maintain its agility. We provide unparalleled technical expertise, direct one-on-one consultations, and year-round educational resources to set your team up for success. Our full suite of products—including clinical proficiency testing, calibration verification/linearity, remedial testing, and online competency courses—is approved by CMS and accepted by CAP, COLA, and The Joint Commission. Visit wslhpt.org to learn more and subscribe to our monthly digest of clinical lab news and product updates.