I was told by a resident in Texas "If you are an anesthesiology pain medicine doc, if you aren't making 1.2 million; you're doing something wrong."
That being said, I have seen posted salaries 700-800K on job listing boards at anesthesiology programs in Dallas, TX.
The 1.2 million figure seems a bit high for starting pay. But I expect if you go from general anesthesiology to pain management, I would guess you could at least double or triple the regular STARTING pay.
You need to realize that average salaries don't mean a lot. There is quite a bit of variation some based on location, how much you actually want to work, how good are your business skills, do people know you exist? Your reputation, your experience etc. Eg. I keep seeing average anesthesiology pay at ~226K,etc. But I also actually meet and talk with a lot of people who are starting at $450K, 300K, even 500K. (general anesthesiology)