Good advice above... in some states they don't hold up at all and employee can start up across the street with former employer helpless (as long as departed isn't blatantly soliciting patients or staff or referral sources).
In others states, it's heavily in employer favor. You will get crushed if you try to go 80% to the edge of the radius. Consult an attorney if it's not clear on Google how it works in the state... should have an attorney for contracts anyways, so ask them to be sure our understanding's correct on how non-competes do/don't hold up in the area.
Typical is 2-5mi for urban and 5-10+ for rural. 2yrs is pretty standard. It should only include office(s) you're working at. Be aware that it will typically knock you out of nearby hospital(s). Many employers will play dirty and try to pretend they have 'satellite' business location near wherever you may go to push you away, but it won't be an issue if you didn't see patients at that made up "accounting office" or "billing office" or whatever.
As you have figured out, it's not good to negotiate hard on this if you want the job. You can blame your attorney for minor changes to it, but if you try to press hard and whittle non-compete down, they will suspect you might just use them as a step stone to get onto insurances, meet docs, then start your own. Negotiate on salary, bonus, buyout price instead.
