need special shoe for short leg 4 1/4 short

I Have been denied by my insurance to make a boot that has a 4 1/4 lift so I can walk they say it is not medically necessary I appealed with a peer to peer with my doctor and was denied again so I appealed then again denied I am on the hearing in front of a aminastrater judge in phoenix on the 17th of jan. I can not walk without the Shoe outside my home the lifted shoe I have is worn so bad it is hard to walk and pain has increased in my legs and back I broke everything from my waist down 28 operations How Can I Get A Favorable Decision that make it medically necessary