Is a breast lift covered under medical insurance if I had a breast reduction 14 years ago?

Thank you for the question. Generally speaking, breast lifting is not covered through health insurance companies. My best advice: seek consultation with a few board-certified plastic surgeons who can demonstrate significant experience achieving the types of outcomes you will be pleased with. Then, communicate your goals carefully as well.   Best to use visual aids such as goal photographs, not a discussion of cup sizes, during the communication process. 
Working together you will come up with the best plan to  achieve an outcome that you will be pleased with.  Best wishes. 

Revisions are commonly needed many years after breast reduction.  Insurance companies do not usually cover this but it is worthwhile pursuing.  Many ASPS board certified plastic surgeons have certified accredited operating rooms in their offices which reduces cost significantly as compared to a hospital.   Revising scars, evening out excess skin and tightening up the breasts can make a big difference 14 years later!  Good luck to you.