Inclusion Criteria:  Males or females from 7 years of age or older Diagnosis of acquired peripheral neuropathy (PN) such as due to diabetes, chemo-induced, autoimmune chronic inflammatory demyelinating polyneuropathy (CIDP) established by a report of electrical studies or with a known genetic CMT diagnosis. Definitive diagnosis of PN is established with a report of electrical studies, EMG/nerve conduction studies.2 Perform assessments to the best of their ability with reliable results as deemed by the evaluator. Ability to attend scheduled appointments Ability to provide informed consent (or assent for ages 9-18)  Exclusion Criteria:  Current pregnancy per medical history Has a medical condition or extenuating circumstances that, in the opinion of the investigator, might compromise the subject's wellbeing, safety, or clinical interpretability