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About CLSI

The Global Leader in Setting Clinical Laboratory Standards

The Clinical and Laboratory Standards Institute (CLSI) is a not-for-profit organization that develops laboratory standards worldwide. Our standards are recognized by laboratories, accreditors, and government agencies as the best way to improve medical laboratory testing.

CLSI by the Numbers


Individuals with membership access.


Products, standards, and guidelines.


Countries with CLSI members.

We improve patient care by bringing experts together to develop standards.

We facilitate the creation of best practice standards, guidelines, and products for medical laboratories by using the expertise of our volunteers. Organizations use CLSI standards to improve their testing outcomes, maintain accreditation, bring products to market faster, and navigate regulatory hurdles.


About Standards Development >

Our specialty areas include:

Automation and Informatics

Clinical Chemistry and Toxicology

General Laboratory


Immunology and Ligand Assay

Method Evaluation


Molecular Diagnostics

Newborn Screening

Point-of-Care Testing

Quality Management Systems

Veterinary Medicine

What We Offer


We bring together the world’s savviest experts on laboratory standards—stay on the leading edge of the lab industry, and shape its future as a CLSI member.

Standards & Products

CLSI offers a range of standards, guidelines, implementation guides, webinars, trainings, and more.


CLSI’s standards are developed and written by volunteer committees of leading experts from around the world. You can get involved today.

Stay Informed

Interested in laboratory-related topics? Read the latest news from CLSI.

Global Impact

Our Global Health Partnerships program provides hands-on support to laboratories around the world, helping them achieve sustainable quality and better treat patients with infectious diseases.

Explore Global Partnerships


The International Organization for Standardization (ISO) is an international body composed of representatives from various global standards organizations. CLSI is the American representative for the Technical Committee of the International Organization for Standardization, which means we are helping shape international lab standards with our colleagues in dozens of other countries. Clinical laboratory testing and in vitro diagnostic test systems. ISO/TC 212 is responsible for international standardization and guidance in the field of laboratory medicine and in vitro diagnostic test systems.

How We Work Together

Leadership & Resources

Board of Directors

Learn more about the board of directors, their mission, and view each member’s profile.


Press Releases

Find important updates, industry news, and information on CLSI’s upcoming events.


Strategic Plan

Learn more about how CLSI is planning for the future.


Mission, Vision, & Values

Learn about the intentions and goals of CLSI that help guide our organization.



Search our FAQs to see if we can quickly answer your question.



Learn more about our organization and its purpose.


Elevate Your Career, Become a Member

CLSI is the meeting place for the world’s savviest experts on laboratory standards. If you want to stay on the leading edge of industry knowledge and shape its future, become a member now.