In 2016, the American Board of Medical Specialties (ABMS) approved pediatric hospital medicine (PHM) as the newest pediatric subspecialty. To characterize development of the field, this article aims to: (1) describe the responsibilities and practice settings of US pediatricians self-identifying as hospitalists; and (2) determine how exclusive PHM practice, compared with PHM practice in combination with general or subspecialty care, was associated with professional development interests.

Pediatricians enrolling in the 2017-2018 American Board of Pediatrics (ABP) Maintenance of Certification program were offered a voluntary survey about their responsibilities, interests, and practice settings. Logistic regression was employed to characterize associations between exclusive PHM practice and: (1) interest in quality improvement (QI) leadership; (2) intention to take the PHM certifying exam; (3) satisfaction with allocation of professional time; and (4) intention to maintain more than one ABP certification.

The survey response rate was 70.0%; 1662 (13.1%) self-reported PHM practice. Four-hundred ninety-one (29.5%) practiced PHM exclusively, 518 (31.1%) practiced PHM and general pediatrics, and 653 (39.3%) practiced PHM and one or more subspecialties. Respondents reporting exclusive PHM practice were significantly more likely to report interest in QI leadership or consultation (adjusted odds ratio [OR], 1.39; 95% CI, 1.09-1.79), PHM exam certification (adjusted OR, 7.10; 95% CI, 5.45-9.25), and maintenance of more than one ABP certification (adjusted OR, 2.64; 95% CI, 1.89-3.68).

Hospitalists reported diverse clinical and nonclinical responsibilities. Those practicing PHM exclusively expressed high levels of interest in board certification and QI leadership. Ongoing monitoring of PHM responsibilities and practice settings will be important to support the professional development of the PHM workforce.