A graduate of West Virginia University, Drinkard completed his internal medicine residency at George Washington University and a fellowship in hematology and oncology at the University of Chicago. He frequently cites the influence of mentor Dr. Everett Vokes in shaping his commitment to evidence-based, patient-centered medicine. His current practice involves traveling across the country to provide consultations on both benign and malignant tumors.

Board-certified in four distinct specialties—internal medicine, hematology, oncology, and hospice and palliative care—Drinkard holds a fellowship with the American College of Physicians. His professional contributions extend beyond the bedside through various publications focused on advancing oncology research. He remains an active participant in organizations such as the American Society of Hematology and the American Society of Clinical Oncology, ensuring his clinical approach keeps pace with evolving standards of care.