Is it possible to have your hiatal hernia repaired using mesh without having the wrap (nissen fundoplication) done at the same time?

Yes, rarely: Sliding hiatal hernias, where the esophagus & stomach "yo-yo" into the chest, are responsible for reflux (gerd). Surgical rx of the gerd includes the wrap. Paraesophageal hiatal hernias are much more rare & more serious--here the stomach twists up into the chest, causing obstruction (or worse). These always require hernia repair; a wrap is not necessary, tho advisable, since gerd often follows.

Why?: The repair if a hiatal hernia with wrap (fundoplication) should meet the goals of prevention or symptom relief. Only large hernias (paraesophageal) are appropriate to repair for prevention. The wrap is to prevent reflux after repair, which divides all the surrounding ligaments from the valve between the esophagus and stomach. The use of mesh is controversial. A laparoscopic approach is best in most cases.