Hangsheng Liu, PhD

In primary care, nurse practitioners and physician assistants do not necessarily order more ancillary services, or more costly services among alternatives, than physicians.

Using data from the New York SCHIP program, this study showed that plan disenrollment was not significantly associated with managed care plan quality.

This study of financial implications of risk adjustment for Medicare payments to individuals with comorbidities and functional impairment demonstrates the importance of controlling for disability.