Qualitative Review of Non-Invasive Vagus Nerve Stimulation (gammaCore): Current Evidence on Efficacy, Safety and Economic Burden for Episodic and Chronic Cluster Headache

Sufficient evidence exists to support the need to modify current reimbursement policies to differentiate non-invasive vagus nerve stimulation from invasive (implantable) vagus nerve stimulation and to explicitly include coverage for gammaCore (nVNS) for episodic cluster headache.