This was from the title page of a very old Japanese book, so if it doesn't really look like a doctor that's because time has changed our stereotypes of what a doctor does I guess. Most of it correlates quite well though, I suppose.
This is a completely free image Cartoon Doctor Frame that you can download, post, and use for any purpose.
Image License: CC0 No Rights Reserved
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission, and at no cost. This image is completely free.