The purpose of this study is to see if batoclimab is safe and helps people with chronic inflammatory demyelinating polyneuropathy (CIDP), an autoimmune disorder. Batoclimab is also known as IMVT-1401. Batoclimab is injected under the skin (subcutaneously) and targets the immune system.

The purpose of the study is to provide a detailed view of the impact of MMN and MMN treatment on patients in the real world. This protocol aims to collect data from participants with MMN to characterize the disease's course and management and the humanistic and economic burden on patients