The condition of extra nipples is really common. Most patients think the extra nipples are moles. They can occur anywhere along the "milk line" which extends from the underarm area, down through the normal nipples and then down to the groin. I had a med school class mate that a nearly complete "milk line". He was very proud of his mammal status! Removing this accessory nipples is easy to do and the scar from removal is usually less obvious than the extra nipple. This can be done with local anesthesia with very little "down time".
Insurance does not pay for this nor should they. It is a cosmetic, not a functional problem.
Lisa Lynn Sowder, M.D.
P.S. To see a normal mammalian nipple line, have your doggie roll onto her back. She's got one!