Hi Searcher,
Does your insurance allow you to see a doctor for a second opinion without a referral?
If yes, go see a doctor at the Ataxia clinic. This might work?
I do not know what kind of insurance you have, I have Medicare and I went for a second opinion to an Ataxia specialist at a Movement Disorder Center and they paid for it.
Good luck and best wishes to you.
Hi Searcher 
Have you had an MRI ?
This may be able to help by showing Cerebellar atrophy, if there is any.
Like everyone else I’m disgusted at the appalling attitude you’ve had to
endure, it’s unforgivable.
Here in the UK we also have mixed opinions of our National Health
Service, quite often it seems to be a lottery, depending on where you
live and the condition you cope with.
If at all possible, definitely pursue an appointment with a Neurologist
who actually specialises in Ataxia. Best wishes xB
It's the same over here - "human tricks" is what rung a bell with me. when I saw my Neurologist two days ago and the same tests were performed for the umpteenth timer, I said that I feel like a performing poodle,I have seen so many neurologists they do the same tests and I feel that I am not believed by them. One of them said my MRI showed problems in the cerebellum - he said it was Ataxia. Two of them said that MRI was just fine, I am fed up with being tested and am angry at the same tests, the walking heel to toe, twiddling my toes and banging my reflexes. I know that the insurance company that is waiting to decide if I'm entitled to any pension probably won't. So it is also a fight over money, I am fed up being tested with no "cause" being identified. In the absense of proof it is seen as a psychological problem of mine, in otherwords I'm making it all up. I feel really despondent now and have felt like that for 2 days now. I wish I had never heard of ataxia, which I'm told is not a diagnosis it is a description of a collection of symptoms, nothing more. Which I could be making up etc etc. Fed up now.