No, not an easy condition to diagnose. sometimes
It is my opinion that there is not a blood test to definitively diagnosis CIDP in all cases.
The NIH offers this: “Exams and Tests An exam shows:
* Loss of muscle mass
* No reflexes
* Problems with the senses
* Muscle weakness
* Sensation problems on both sides of the body, moving from the arms and legs to the center of the body
Tests may include:
* Electromyography (EMG)
* Nerve conduction tests
* Nerve biopsy
* Spinal tap”
You’ll notice, unless I overlooked it in the original article, that ‘blood test’ is not included.
In my case, and every case is different, even the EMG/NCS results are not interpreted the same way by all the doctors. I did not get a diagnoses until I had a very specialized nerve biospy.
Bt the way, my spinal taps have all been at, or near, normal.