Wash. Rev. Code § 70.230.080
(1) Every ambulatory surgical facility shall maintain a coordinated quality improvement program for the improvement of the quality of health care services rendered to patients and the identification and prevention of medical malpractice. The program shall include at least the following:
(3) Information and documents, including complaints and incident reports, created specifically for, and collected and maintained by, a quality improvement committee are not subject to review or disclosure, except as provided in this section, or discovery or introduction into evidence in any civil action, and no person who was in attendance at a meeting of such committee or who participated in the creation, collection, or maintenance of information or documents specifically for the committee shall be permitted or required to testify in any civil action as to the content of such proceedings or the documents and information prepared specifically for the committee. This subsection does not preclude:
[ 2019 c 55 s 16; 2013 c 301 s 4; 2007 c 273 s 9.]