SPOKANE – Eastern Washington U.S. Attorney Vanessa Waldref has announced that the United States and state of Washington has filed a complaint in federal district court against MultiCare Health System, a Tacoma-based hospital and healthcare system that owns and operates MultiCare Deaconess Hospital and MultiCare Rockwood Clinic in Spokane, alleging that MultiCare knowingly endangered patient safety and falsely and fraudulently billed Medicare, Medicaid, and other federal health care programs for spinal surgery procedures performed at Deaconess between 2019 and 2021 by Dr. Jason Dreyer, a former neurosurgeon.