Ping Zheng

Medicaid prior authorization and opioid medication abuse and overdose.

D. Kelley, W. Gellad, C. Chang, 2017, The American journal of managed care.

Prescription Opioid Quality Measures Applied Among Pennsylvania Medicaid Enrollees

D. Kelley, W. Gellad, C. Chang, 2018, Journal of managed care & specialty pharmacy.

An Examination of Claims-based Predictors of Overdose from a Large Medicaid Program

Julie M Donohue, Wei-Hsuan Lo-Ciganic, W. Gellad, 2017, Medical care.