The International Organization for Standardization (ISO)  published the 4th edition of ISO 15189:2022 on December 6, 2022. The revisions  to the standard were developed over the course of four years by a team of  experts, including American Association for Laboratory Accreditation (A2LA)  staff member Randy Querry, Director of Government Relations. The team was led by  Sheila Woodcock, Quality Management Consultant, and included professionals from  the medical laboratory testing community.
A2LA achieved the Centers for Medicare and Medicaid Services  (CMS) Deemed Status and International Laboratory Accreditation Cooperation  (ILAC) Recognition for ISO 15189.
According to ISO, ISO 15189 “is applicable to medical  laboratories in developing their management systems and assessing their  competence. It is also applicable for confirming or recognizing the competence  of medical laboratories by laboratory users, regulatory authorities, and  accreditation bodies.” 
Revisions were made to the standard to put more focus on the  patient, including updated requirements for point-of-care testing (POCT). POCT  requirements were previously documented in ISO 22870:2016, which has now been  incorporated in an annex in the 4th edition of ISO 15189. The updated standard  takes a less prescriptive approach with an increased emphasis on risk  management, putting patient care rightfully at the forefront of the  requirements.
Additional changes were also made to align the standard with  ISO/IEC 17025:2017, which resulted in management requirements now appearing at  the end of the document.
The International Laboratory Accreditation Cooperation  issued ILAC Resolution GA 26.08 providing a transition period of three years  from the date of publication. This provides testing laboratories with  sufficient time to prepare to upgrade to the new requirements while maintaining  their existing accreditation. 
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