2.6M is a busy practice. When I was doing pain it was expected that 50% was to overhead. So if you were a true and equal partner here you would be getting 1.3M and so you are upset. Those days in Pain are over.
It sounds like you are being fed these patients are opposed to you building this practice. For example if you work in an ortho group and you are seeing all of their patients who are automatically referred to you, is there not some money rightfully taken off the top for the group? If you had to build this practice how long would it take you to get to 2.6M in revenue? Couldnt they pay someone else to come in and do the exact same job for 500k since they are just feeding this person patients? And thats exactly why they have the non compete. These patients are not seen as your patients they are seen as the practices patients..
Not saying its right, but just saying that the people who get the 50% of revenue in a true partnership setting did something to earn that like buy in , build the practice, or sweat equity..
Noncompetes are common in pain and I know many people, myself included, who had to move as a result of the non compete.
In your situation I would tell the new practice about the non compete and maybe their lawyers know a way around it if they really want you