Skip to main content
University of Wisconsin Crest

WSLH Proficiency Testing

Wisconsin State Laboratory of Hygiene

About Us

About WSLH Proficiency Testing

WSLH Proficiency Testing is your PT provider, backed by a national public health laboratory and a Big Ten university.
With WSLH PT, you receive reliable, affordable, and easy-to-use proficiency testing products with rapid access to results. 

Why choose WSLH PT as your PT provider? 
Download this one-page handout to share with your lab staff.
Watch our introduction video to get the whirlwind tour of WSLH PT.

Technical Expertise

Each of our proficiency testing programs has a dedicated Medical Technologist with at least 5 years of extensive instrument knowledge. 

Provider-Centered Customer SERVICE

No matter the size of your order, we provide ongoing technical troubleshooting with unparalleled customer service to meet your laboratory's needs. 


Our mission-minded approach to laboratory proficiency testing provides you with the technical expertise and educational resources to set you up for success.

Your Lab, Our Mission

In 1966, WSLH Proficiency Testing was developed by the Wisconsin State Laboratory of Hygiene to create proficiency testing programs that improve laboratory quality. Today, we provide you with a solid foundation for clinical laboratory improvement, direct from our headquarters in Madison, Wisconsin. 

We are an affiliate of the University of Wisconsin-Madison’s School of Medicine and Public Health. As part of a higher education institution, WSLH PT is dedicated to improving and protecting the human condition through quality service and education. 

Some of our features

14 day average turnaround time on evaluation reports

Our staggered shipments ease the burden on staff

Samples are always available at low cost

Easy access to worksheets, submission reports & more

Data Upload: Handle your PT data like your patient data

Get the whirlwind tour

Watch the video to learn more about what you can expect from WSLH PT, including PT Central, customer service and shipping, as well as other services. This video may also be used as a training introduction video for your clinical lab staff. 

To view more training videos, please visit our Video Tutorial Library.

What Our Customers Are Saying

"I placed a small order; however, you treated me with the professionalism and attention as if I had placed a large order."
Justin C.
"Working with WSLH was an excellent experience."
Cathy S.
"I want to compliment WSLH for great customer service!"
Laura M.
"We needed an off-schedule proficiency test; and, from the time I contacted WSLH to getting our results back, the process was so quick. Tracy responded so quickly and made everything effortless."
Christy M.
Great customer service!
Warren B.

How can we best serve your facility? We want to know! Contact WSLH PT Customer Service at (800) 462-5261 or at

WSLH Proficiency Testing is approved by CMS, and accepted by CAP, COLA, and The Joint Commission.