Can I combine hernia repair with TT so insurance will cover some of the costs?

Hernia repair in conjunction with a tummy tuck is not an uncommon combination surgery.  Depending on how large the hernia is, it may be repaired with or without the addition of mesh for additional support.  Your best results will come when you are at a stable weight.  I would recommend that you visit a board-certified plastic surgeon who can examine you in person and review your options with you.

Combining hernia repair with a tummy tuck or other contouring procedure is very commonly performed and is a great opportunity to get both things done with one recovery. Depending on the size and complexity of the hernia, your plastic surgeon may ask a general surgeon to collaborate on your surgery.
While insurance will almost always cover hernia repair, body contouring is rarely considered medically necessary and the patient must pay for this part. 

Thank you for sharing your excellent question.  As long as you are not having any serious symptoms from your hernia (your general surgeon should be able to ensure this) the best course of action would be to pursue a healthy diet and exercise regimen to lose additional weight. Weight loss not only reduces your risk of hernia recurrence but also will minimize the risks of surgery and improve your aesthetic outcome from a tummy tuck.  Once at a lower and stable weight both procedures can be safely performed in a single operation.  Hope this helps.