How will the system work if not every single Doctor subscribes?
Not every medical professional has to join for the system to successfully function.  In fact, the break even or the point in which it is feasible to provide the service is as follows:

 Market          Break
Estimate         Even
Hospitals                    5,815               16
Physicians             466,717           3,288
PAs                           74,800              527
ERs                              6,200               87

In addition, the service provided to the patient and to the medical professional works very well with an estimated .7 of 1 % of the market.  All the services are provided and no one is short changed.
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