Hi Michael,
There isn't a way to add coordinates or zoom level to the URL, so likely this is going to involve some kind of customization (code) on your end. One option might be to use Bookmarks - we have a Sample (under the Toolkit section) for this so you could download the code and use the add-in without having to write any code yourself. Another option might be to create a tool that takes lat/long as parameters and zooms to the location. There are probably several different solutions, and maybe some of the other users here on the forums have ideas or can share code for this.
Katy