Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is an immune-mediated neuropathy that is characterized by a slowly progressive sensory and motor involvement lasting at least 2 months. We present a CIDP patient on subcutaneous Ig (SCIg). Upon fine-tuning his dose from 24 to 28 g/week, this showed a dramatic improvement in both hand grip (13–25%) and dorsiflexion (73–278%). Follow-up nerve conduction studies also demonstrated significant improvements in latencies, motor amplitudes, and conduction velocities. Ongoing surveillance of CIDP patients receiving SCIg therapy is therefore necessary to ensure therapeutic optimization.