Before I was diagnosed with PN, my CRP was also flagged high at 5.4 MG/DL. (Under the reference ranges, it states <0.8).

It was a terrible experience. I had all of the classic debilitating symptoms and the first (non neuro) doctor I saw said blood work looks good, I look like the picture of health and to try to enjoy life more. I insisted something was terribly wrong, again explaining my symptoms and he laughed and told me to have a good day.