If you are enrolled in an Aetna health plan, you have access to the Aetna Institutes of Quality (IOQ), a special network of hospitals and other facilities that specialize in spine surgery, knee replacement and hip replacement. Facilities earn IOQ status for showing high levels of quality and efficiency for certain orthopedic procedures like total joint replacement and spinal surgery. Find a list of IOQ facilities and specialists by visiting www.aetna.com: Services provided at an IOQ will be covered at 100 percent after the deductible.