The Health Care Finance Administration ( Medicare / Medicaid ) sets reimbursements rates, and most private insurance companies follow suit. So, I don't get to charge whatever I want to read an MRI. And, I don't order the studies that I read, other doctors do that.
The only thing I can control is the number of studies I read. If I work harder and read more, I make more. It just so happens that I am very fast, and I have surrounded myself with fast partners. On average we read two or three times what other radiologists read, so we make two or three times more.
As far as disruption is concerned, for now the law is on my side. Of course a doctor working in India could read studies cheaper than I could. Most doctors complain about malpractice, without understanding the benefits. Trial lawyers hold me liable for my reports, and rightly so. If I miss a small treatable cancer, it can turn into a large untreatable cancer. This liability also confers a monopoly. How can a lawyer sue a doctor in India? Consequently, in order to perform a 'final read' on a radiology study in the USA, you must have trained in USA, be credentialed in the USA, and liable in the USA. This makes it very hard to undercut on price.
So, I'm not sure if I deserve what I make. There aren't a lot of people that can do my job, or withstand the training. Anyway, I'm saving everything I earn, because I don't think it will last forever.