He attended the Seth G. S. Medical College in Mumbai, India, and completed his orthopedic residency at the Lokmanya Tilak Municipal General Hospital in Mumbai. Dr. Thacker has had extensive subspecialty training through pediatric orthopedic fellowships at the National University Hospital in Singapore, Hospital for Joint Diseases/New York University in New York, and duPont Hospital for Children. He also completed a fellowship in musculoskeletal oncology at the Jackson Memorial Hospital/University of Miami.