Inova Fair Oaks Hospital (Fairfax, Va.). Inova Fair Oaks Hospital is a 182-bed acute care facility specializing in spine, weight loss, joint replacement and minimally invasive surgery. Truven Health Analytics named the hospital to its 100 Top Hospitals list for the fourth time in 2017. In 2014, the hospital received The Joint Commission's Gold Seal of Approval for stroke care, spine surgery as well as hip and knee replacement surgery.