Need Help?

CLSI is setting the standard for quality in clinical laboratory testing around the world.

A not-for-profit membership organization, the Clinical and Laboratory Standards Institute (CLSI) brings together the global laboratory community for a common cause: fostering excellence in laboratory medicine.

Together, we guide the development and implementation of standards and guidelines that help all laboratories fulfill their responsibilities with efficiency, effectiveness, and global applicability.

Committed to Continually Advancing Laboratory Practices

For over 40 years, our members, volunteers, and customers have made CLSI a respected, transformative leader in the development and implementation of clinical laboratory testing standards. Through our unified efforts, we will continue to set and uphold the standards that drive quality test results, enhance patient care delivery, and improve the public’s health around the world.

CLSI is fulfilling its mission—to improve the quality of laboratory testing—through:

Membership Opportunities

Bringing together government, industry, and laboratory health care professionals to network and collaborate on common challenges.

CLSI membership connects you with over 2,000 organizations across the globe involved in medical testing and health care services.

Consensus-based Standards and Guidelines

Delivering the most widely accepted clinical laboratory standards for raising levels of quality, safety, and efficiency in laboratory testing and reporting.

CLSI distributes more than 75,000 standards worldwide each year

Educational Programs

Providing the educational tools and training that help laboratories use and implement our technical guidelines.

CLSI U offers more than 50 training and product resources to laboratorians and industry organizations.

Global Health Partnerships

Enabling laboratories in resource-constrained countries to rapidly improve quality and prepare for international accreditation.

Global Health Partnerships has provided support services to resource-constrained laboratories in over 20 countries.

Discover the Value of CLSI Today

Visit the Membership page to learn more about the benefits a CLSI membership can offer you and your organization.

To find CLSI standards and other product offerings, visit our online store.