Only way see that many effectively requires you to have a crack staff, and not let patients talk your ear off. It's an art, and unfortunately the "crack staff" can get burned out easily, which translates into you doing more, which ends up burning you out. Then you train up another crack staff, and the cycle continues. That's been my experience anyway...
Yeah, it's only really possible in private practice (and rare exception of large school/residency clinic using them as PAs)... and still has to be fairly well-run office regardless. It is easy to see 50+ if it's a nail jail practice where the doc just pops in at the end to do a 2min exam and hello. Any podiatrist could do that C&C high volume... kinda like a DDS office with all just dental cleaning visits.
It is fairly tough for any DPM to see 50+ with actual mix pathology of derm/ortho/sports/diab and some surgery, but I have worked in a few of them that did it pretty well. There are some LONG days of charting, but you adjust and can keep up with the pt flow. It sounds and seems impossible until you are in that world and just adapt to it. A lot of it is just giving up control (which is tough if you like patients and can't retain good staff). Dtrack said it well with regard to call/availability, but I think we often assume we are more important than we really are... MAs can be trained to do basically everything except diagnostics and procedures if you are willing to create a system for a manager to train them... or them to train each other.
You definitely need a high staff, high volume setup with many MAs, good manager/trainer, many exam rooms, fairly quick visits, procedure setups done well, staff does all of the nail care, DME, bandage removals, all Rx, brings u/s in, etc with just verbal cues. It's the type of office were you walk into a new pt PF consult, and the MA already has the XR up on screen and also printed it, PF stretching handout ready, knows pt shoe size for possible insoles, injections are in top drawer, u/s is outside the door, etc.
I definitely prefer seeing about 30-40 and doing a bit more myself, though. Maybe it's just because I haven't finished boards yet, but I just don't like having that feeling of being behind all day, almost zero breaks, having to delay some procedures since I know I'm far behind, a ton of charts at the end. I would do it if I had a good scribe, and I might do it anyways once I finish boards and quit getting my charts nitpicked and blown apart.
...I don't think it's too uncommon to see 50+ in PP in other various MD specialties, though. A lot of them do it well. Almost any ortho or interv card doc I've ever met in PP does it. Many gen surg, ENT, derm, IM specialties like Endo or Rheum, and other procedure or non-procedure PP specialists average 50+ by spending 15-20+min with new pts but only 5-10min or less with f/u and having scribe in addition to many MAs. A lot of the surgeon/procedure doc office staff one or more PAs (or RN or residents), though... so it depends if you want to look at that as just staff or additional "provider" seeing their own pts. Regardless, patients often won't even see the doc at a routine f/u or post-op unless it's the hi-and-bye at the end. The doc basically just hits the new pts, complications, complex f/u ones.
The system for 50+ can be done, but the question is if you want it or if you can create it. I think that is the biggest scam running: hospitals (or mediocre PP with crap staffing or marketing) hiring docs with teaser of productivity pay, then giving them NO control over the staffing, marketing, supplies, scheduling, call schedule, or other stuff that can create efficiency. The clinic just withers on the vine, and the doc can do nothing but steam about it and enjoy their base salary. I don't fault the legitimately busy PPs that crank volume and want to pay docs who will work for good pay in that fast paced office setup, though.