@smn1, I'm assuming you are referring to elevated creatine kinase (CK) levels and what connection it may have with neuropathy. I've never had the test done but I do have idiopathic small fiber peripheral neuropathy. Here are a couple of references on your question.

-- Elevated Creatine Kinase in Patients with Peripheral Neuropathy:
https://www.neurology.org/doi/10.1212/WNL.92.15_supplement.P3.4-021
-- A case control study of the relationship between persistent serum creatine kinase elevation and polyneuropathy: https://www.nature.com/articles/s41598-024-64555-x

You might want to scan through the member comments on Connect that mention creatine kinase (CK) levels - https://connect.mayoclinic.org/search/comments/