Thanks for your profile info. I'd say Stern may be more realistic given your current profile and Columbia would be a bit of a reach school. Here's why:
Academics: Stellar GMAT score! However, your undergrad GPA is fairly low. I'm not sure if there is a particular reason for that, but it does slightly dampen that great GMAT. If you have a reason for it or a story or just some mistakes to own up to there, I suggest addressing them in an optional statement. Hopefully they'll weight your grad school GPA and GMAT over undergrad at this point, but still worth addressing. I think you can overcome it, though.
Professional: Sounds like you've had a good track in healthcare so far - you are still quite early in your professional career though, so I'm not sure how much professional leadership potential you'll be able to demonstrate. Be sure to take on as much leadership responsibility as you possibly can between now and when you apply!
EC: It's great that you tutor in your free time. Not sure how much you'll be able to demonstrate leadership through that activity, though (unless you've built your own tutoring company or something like that!). I'd say right now this dimension isn't quite as robust as you'd want it to be for Columbia. Really want to show that you are deeply passionate about certain things/activities and that you are involved in them in a meaningful way.
Community: I'm not seeing a whole lot or any community service in your profile (I'm assuming you tutor for pay). This is a fairly significant gap in your profile, and something I would suggest you try to fill sooner rather than later. Again, try to demonstrate leadership (rather than just volunteering for an organization and showing up each Sat to do xyz, see if you can attain or work up to a board position or start an initiative/organization on your own!). Whatever you get involved in and in whatever capacity, it ought to be something you are truly passionate about to ensure you'll go the extra mile.
All in all, I'd say that while your GMAT is excellent, the rest of your profile does not really stand out. Perhaps you have some really strong professional leadership stories that I just don't know about, but in the absence of those, I'd say Columbia could be difficult. You have an opportunity to really round out your profile though, so take advantage of the time and get involved/get leading!
Hope that helps,
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