Better Standards. Better Results. Better Care.

The Clinical and Laboratory Standards Institute (CLSI) is a globally recognized not-for-profit standards development organization with over 24,000 members, 1,200 volunteers, and 250+ products. Our standards are recognized by laboratories, accreditors, and government agencies around the world as the best way to improve medical laboratory testing.

Through the work of our volunteers, we facilitate the creation of best practice standards, guidelines, and products for medical laboratories. Organizations use CLSI standards to improve their testing outcomes, maintain accreditation, bring products to market faster, and navigate regulatory hurdles. Our products focus on the following specialty areas:

Because every patient deserves the best. CLSI is a community committed to better medical laboratory test results. Our mission is simple: to develop clinical and laboratory practices and promote their use worldwide. Our vision: setting the standard in laboratory medicine for a healthier world, explains the why.