Full Tummy Tuck Belly Button Untouched?

Concentrate on getting well --- it's too late to worry about what your doctor did. You should have known about this before the surgery, not try to deal with it after.

Sounds like you had an umbilical transposition. There are many ways to perform surgeries and a few ways to handle the belly button. In your case your surgeon did nothing wrong, they just did not discuss the technique used. Sometimes we change our minds during a procedure and this could have happened in your case. Your belly button was cut across beneath the abdominal wall and when your skin was pulled tight it was brought down and secured to your abdominal wall in it's new position. If you are happy then nothing else is needed.

Your plastic surgeon should have or may have discussed the operative plan with you during your consultation or pre-operative exam.  If you had a minimal problem above the umbilicus you may of had an umbilical translocation.  Instead of cutting around the umbilicus externally the umbilical stalk is transected at the level of the fascia and can be moved down about 2 cm and still appear normal.  It is possible that this method was used for your case.   If you are happy with the result then you have your answer. I pay particular attention to the umbilicus in every abdominoplasty since it is the most visible area.  The low transverse scar can be hidden with  your underwear or bathing suit.  Patient satisfaction is the goal of every plastic surgeon.