Washington Revised Code Title 70. Public Health and Safety § 70.47.150. Confidentiality

Notwithstanding the provisions of chapter 42.56 RCW, (1) records obtained, reviewed by, or on file with the plan containing information concerning medical treatment of individuals shall be exempt from public inspection and copying; and (2) actuarial formulas, statistics, and assumptions submitted in support of a rate filing by a managed health care system or submitted to the *administrator upon his or her request shall be exempt from public inspection and copying in order to preserve trade secrets or prevent unfair competition.