I don't agree.
A little background:
I am a hospital systems designer and consultant. I actually built one of the first EHR clients for iPhone, before the iPad came out (Rejected from YC in 2009), I was the technology implementation manager for the new El Camino Hospital build, I was the primary technology designer for San Francisco General's new 850MM facility. I am consulting on the UCSF Mission Bay project for technology and transition, and the same for UTSW in Dallas. I am also the transition planner for a small 100MM facility in Nome Alaska.
In all of these projects I design and or consult on all aspects of technology implementation, use, training etc..
I even sent an RFP for EHR implementation to Dr. Chrono to see if you guys could step up to a larger facility ($5MM budget for that piece), I heard nothing back for weeks until after the deadline when I was then told that you couldn't respond - and then had a sales guy call me trying to get me to sign up as a physician.
Anyway -- getting a private practice of ~10 physicians to use your product is in no way a gateway to hospitals. They are completely different markets.
The EMR implementations in large hospitals are multi-million dollar implementations and they take ~18 months to accomplish.
The sheer number of workflows needed and the integrations with various systems are daunting and non-trivial.
You are going after a massively entrenched market with many many millions of dollars committed by all the customers
I fully hope that there can be a serious shakeup in health IT, but having some success with 1-10 physicians and then expecting to parlay that to hospitals with thousands of employees, or even hundreds (like in Nome) is a tall tale.
I think there are TONS of opportunity to disrupt healthcare, and DrChrono is a great app - it is just not mature enough or on scale enough to compete against the larger EHR market YET.
EDIT:
I'd like to add - that if you want to continue to build a free product, and you want to get into the larger scale EHR space - I suggest you partner with/learn from/attempt to implement on-top-of MedSphere's OpenVista EHR.
DrChrono has some great features - and if you make the capabilities more robust then you can get into this market more easily.
OpenVista is used widely outside the US as well, and this would be an opportunity to capture the Asian/Indian market.
Also, if you take some of the features you have (Voice Notes, etc) and offer them as a stand-alone-ish product - then you can attempt to get physicians already in large hospitals to use that product - not selling it as an EHR, but a needed tool, and expand from there.
If you stay away from the EHR/EMR moniker when infiltrating physicians in larger hospitals you'll more easily get under ITs radar.
Every hospital has iPad users already, and most are rolling out official IT support for them - so you need to get an app that physicians can use in parallel to their epic/siemens/cerner/eclypsis solution without pissing IT off.