I was not aware that other programs used to have multiple fellowships. I think almost all interested in pain would go for an anesthesiology-directed fellowship. We had a recent meeting about this though heading into the new interview season for fellowships. Speaking to our institutional experience with the fellowship, the interest (gauged by number of applicants) is quite high, roughly 5-7x the number of applicants as to our cardiac fellowship and 10x to our CCM. I seem to remember about 1/4 to 1/3 being applicants who were not anesthesiology trained, and those are typically not nearly as competitive as the anesthesiology applicants as judged by that division. I think we've had 1 or 2 non-anesthesiology fellows in our PM program in the past 4 years I've been here.
Interestingly, last year was the first in the past 10 where the number of applicants did not increase and ever-so-slightly decreased.