I would bet that it is either an academic job OR less than full-time. Remember, a lot of psychiatrists choose to work less than 40 hours a week, because we can, which is one reason why it appears psychiatrists earn less than other specialties. Making 90K if you're only working 20 hours a week isn't necessarily a bad deal.
In fact, that's a good thing to keep in mind any time you're trying to compare our income to other specialties. Yes, many other specialties make more money than I do, but they also work much longer hours and have worse lifestyles. In my opinion, once you have an upper middle class income, the value of any more money quickly reaches diminishing returns. Time off to do what I want with my family means lot more to me at this point than extra money would.
Where I live, academic medicine jobs pay around 150K, but I took a job that paid me >$225,000 my first year going up to >$280,000 after 1 year. I actually would have preferred the academic job in a lot of ways (loved the faculty at the program, loved the nature of the work), but money talks when you have student loans to pay off.
If anyone is surprised that I just told you what I make, here's why: My view is that when we keep mum about our salaries, we are just making it easy for employers to screw us over in negotiations. No need to be ashamed or secretive about it.