Devices, systems and methods are disclosed that allow a patient to self-treat a medical condition, such as migraine headache, by electrical noninvasive stimulation of a vagus nerve. The system comprises a stimulator that is applied to the surface of the patient's neck, as well as a docking station that is used to charge a rechargeable battery within the stimulator. The docking station and stimulator housing transmit data to one another regarding the status of a stimulation session, as well as to a computer program in a patient interface device such as a mobile phone or computer. The interface device in turn communicates with medical record and billing databases contained within other computers, via the internet. The system is designed to address problems that arise particularly during self-treatment, when a medical professional is not present.