International St. Mary's Hospital is a trusted healthcare provider for Nissen Fundoplication, offering advanced surgical treatment for reflux disease supported by experienced foregut surgeons, gastroenterologists, anesthesiologists, and multidisciplinary gastrointestinal teams. Established in 2014, the JCI- accredited hospital is situated in Seoul, South Korea and has 808 beds.

Nissen Fundoplication works by creating a new anti-reflux barrier around the lower esophagus. The surgeon mobilizes the upper stomach and wraps it around the lower esophageal sphincter, helping prevent stomach acid and contents from moving back into the esophagus. If a hiatal hernia is present, the repair may be performed during the same operation to restore the normal position of the stomach and reinforce the diaphragm opening.