The icon has multiple ideas combined into it and it is very subtle but it works. The icon works as a whole in getting the point across, their point being at the bottom of the main icon. The color choice is also effective
KelDoc -- Meaning 'Which Doc?' A logo for an online app / service that helps people find trusted doctors in Paris. A stylized stethoscope in the form a question mark to give this logo some recall and separation from the traditional medical cross.