Weingarten et al1 have addressed the quality of care provided by subspecialists working outside their specialty. However, as the authors note in the "Data Source" section of their article, only 1 of the 6 hospitals in the Cleveland, Ohio, consortium had a hospitalist program. Therefore, an important distinction needs to be drawn between subspecialists trained as hospitalists (commonly but not exclusively pulmonologists) and those not trained as hospitalists.
Botnick WC. Care Provided by Subspecialists Working Outside Their Specialty: The Importance of Hospitalist Training. Arch Intern Med. 2002;162(14):1647. doi: