His areas of clinical interest consist of arrhythmias (irregular heartbeats), holter monitoring, and nuclear cardiology. His hospital/clinic affiliations include BayCare Alliant Hospital, BayCare Physician Partners, and Mease Countryside Hospital. Dr. Zelenka honors Blue Cross Blue Shield EPO, Blue Cross Blue Shield Bronze, and Blue Cross Blue Shield HMO, as well as other insurance carriers. He studied medicine at SUNY Upstate Medical University. Dr. Zelenka trained at a hospital affiliated with Indiana University for his residency. He has received the distinction of Florida Super Doctors 2009 - Gulf Coast Edition. He speaks Spanish.