Is CLSI an accredited standards development organization? Victoria Phucas November 04, 2019 21:43 Updated Follow Yes, CLSI is accredited by the American National Standards Institute. Related articles Are CLSI standards and guidelines mandatory? What is CLSI's policy on harmonization of terms and methods? Why types of documents and products does CLSI offer? What is the CLSI process for developing a consensus standard or guideline? How often does CLSI update documents?