Establishes the Washington state patient safety act.

Requires the department of health to: (1) With stakeholder input, adopt patient assignment limits and recommend quality indicators;

(2) Upon receipt of a complaint, conduct an audit of a hospital's compliance with this act and investigate complaints of violations of this act; and

(3) Maintain, for public inspection, records of civil penalties, administrative actions, or license suspensions or revocations imposed on hospitals.

Requires a hospital to: (1) Submit a staffing plan to the department of health on at least an annual basis, implement the staffing plan, and assign nursing personnel to each patient care unit in accordance with the plan; and

(2) Regularly collect information regarding nurse staffing and submit it to the department of health semiannually.