Although a small subset of CIDP patients demonstrates antibody responses to myelin proteins (e.g., P0, P2, and PMP‐22) and, more recently, to nodal/paranodal proteins such as NF155, CNTN1, and Caspr1, these antibodies are not consistently detected across all cases. Here, CNTNAP1 is linked to chronic inflammatory demyelinating polyradiculoneuropathy.