Just a thought, the icon above the "phone" part to me says WIFI. Phone is best represented to me by the bars icon (starting small, gaining in height as it moves to the right). Don't know if that would suit the design or not, as it doesn't have the same symmetry of what you currently have.
Despite some previous examples, I would stay away from scalpels, face masks, and illustrated doctors in general. That is, unless the point is to try and look like a single person operation still stuck in the early 90's.