Idiopathic means they don't know why you have neuropathy.

Nothing to do with test results.

Many people get all kinds of blood tests which reveal nothing. And the doctor says "you have Idiopathic Peripheral Neuropathy".

Like what happened to my husband for 15 years.

Then he got a spinal tap, they found protein, they concluded he has autoimmune stuff going on, and now he is on IVIG. It's helped him a great deal.