As an experienced attending (8 years out), I typically spend an hour or so a day outside of clinic hours dealing with work stuff. Some of this is notes, some is InBasket management, some is calling patients/consultants. I only see patients 2 days a week (I'm mostly administrative at this point) so if I had more clinic time, I might do more of it.
As a first year fellow, I'd say it was probably 3-4 extra hours a day. Probably 2-3 hours during my first few years out of fellowship. At this point, I've got the skills to review most new patient cases in 5-10 minutes before I walk into the room. For the follow up patients I just look at my last note and figure out what's up from there. I have more than enough time between patients (even with 15 min appointments, seeing 18-23 patients a day) to do this and stay on schedule. 95% of my notes are done before I leave the office.
This week I saw 45 patients (5 new) in 2 days and when I left my office at 5 today, I had 1 open note on a new patient that was such BS I'm still pissed I even had to see them (mild thrombocytopenia for 20+ years, previously seen by 4 other hematologists with 3 normal bone marrow biopsies).
It gets better.