Areas of expertise for Dr. Kaag include bladder cancer, testicular cancer, and kidney cancer. Dr. Kaag honors United Healthcare Platinum, United Healthcare Navigate, and Coventry, in addition to other insurance carriers. He studied medicine at Penn State College of Medicine. For his professional training, Dr. Kaag completed a residency program at Penn State Hershey Medical Center. Dr. Kaag is affiliated with Penn State Milton S. Hershey Medical Center.