@wondrous,
Diagnosing/ruling out WD is really complicated...it's a genetic disorder that causes copper to build up in the liver, so most docs think of it only as a liver disease, but it has a neurological presentation and a psychiatric presentation too, because sometimes the liver spits excess copper into other organs, like the brain, so it can cause anxiety, depression, dystonia, all sorts of neurological symptoms, even though LFTs might be normal.
The first tests usually done are 24hr urinary copper test - along with ceruloplasmin and serum copper - and also a slit lamp exam with an ophthalmologist to check for Kayser-Fleischer rings.
Even someone with normal test results can have it though. A liver biopsy is the only real way to rule it out. NB: Ceruloplasmin is an acute phase reactant so can be falsely elevated when inflammation is present.
I personally think that people can have unbound copper problems without having WD. (Eg, I think I have a malabsorption problem.)