The Washington Opioid Treatment Agreement (WTA) is an agreement between the Washington State Department of Health and opioid treatment providers (Otis) in the state of Washington. This agreement is designed to ensure that opioid treatment programs are operated in a safe and effective manner, with the goal of providing quality care to those suffering from opioid addiction. The agreement outlines standards for patient care, provider training, and record keeping, and requires Otis to comply with all applicable regulations and laws. There are two types of Washington Opioid Treatment Agreement: a Basic Agreement and an Enhanced Agreement. The Basic Agreement sets out the minimum requirements for Otis, while the Enhanced Agreement sets out additional requirements. Both agreements require Otis to provide patient-centered care, adhere to quality assurance standards, and ensure the safety of patients and staff.