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Expertise of Gary S. Allen, MD, MMM, FACS

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Gary S. Allen, MD, MMM, FACS, is a board-certified cardiothoracic surgeon who specializes in treating patients with various disorders of the lungs, heart and great vessels. He is specially trained in minimally invasive techniques for performing aortic valve, mitral valve and lung surgery. Dr. Allen has vast experience in performing beating heart (off pump) coronary artery bypass graft surgery, repair of ascending aortic aneurysm and surgical correction for atrial fibrillation. A recipient of the Ralph D. Alley Prize for Cardiothoracic Surgery and other honors, Dr. Allen is a leader in his field who provides cardiac and thoracic surgical services at AdventHealth Waterman.

Areas Served
Tavares, FL
Languages Spoken

Albany Medical Center Hospital


General Surgery at University of Texas Medical School at Houston

Surgery at General - The University of Texas Health Science Center at Houston


Thoracic Surgery at University Of Utah Hospital

Thoracic & Cardiovascular Surgery at University of Utah Medical Center

Board Certification

Thoracic Surgery (Cardiothoracic Vascular Surgery): The American Board of Thoracic Surgery

Ages Accepted

Insurances accepted by Gary S. Allen, MD, MMM, FACS


The list below is for reference purposes only and is subject to change. Please check with your health plan to confirm that this doctor is included before scheduling an appointment.

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  • AdventHealth Advantage Plan
  • Allegiance
  • Oscar Health