Since my model of practice (a monthly fee without copay or other profitable procedures/products) benefits most from people paying for my service without heavy use of those services, this seemed to be prudent. It seems that I was right about this, when comparing experiences with my colleague. People are much less likely to pay $50 per month (or more) unless they have significant need, so a higher price essentially selects for more complex and/or demanding patients.
This is why I can reasonably handle 640 patients today with only two nurses (one of whom is away on vacation). Yes, I don't get as much money as I would for 640 patients at a higher monthly rate, but I wonder if I could actually handle that number of patients with only two nurses if I selected out for more demanding patients with that higher rate. I doubt it. The longer I consider this, the more I'm convinced of its truth, and the less I am inclined to raise my rates (much to the chagrin of my accountant).