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David Onsager, MD

Clinical Associate of Surgery

David Onsager, MD, is a highly skilled thoracic surgeon. Dr. Onsager has expertise in heart and lung transplantation as well as mechanical circulatory devices, including left ventricular assist devices and intra-aortic balloon pumps.

Through his research, Dr. Onsager has investigated ways to improve surgical techniques and processes, and has been published in multiple peer-reviewed journals, such as Thoracic Cardiovascular Surgery.

Practice Location

University of Chicago Medicine
5841 S. Maryland Avenue
Chicago, IL 60637

Year Started Practice


Board Certifications

Thoracic Surgery

Medical School

Rush Medical School

Internship and Residency

Medical College of Wisconsin (Surgery)


University of Wisconsin (Thoracic Surgery)
University of Wisconsin (Heart & Lung Transplantation)


Chicago Cardiothoracic Surgical Society
American College of Surgeons
Society of Thoracic Surgeons
Illinois Thoracic Surgical Society
International College of Surgeons
International Society for Heart and Lung Transplantation

Language Spoken



Office Phone

(773) 702-2500

Office Fax

(773) 702-4187

Office Postal Address

David Onsager, MD
University of Chicago Medicine
5841 S. Maryland Avenue, MC 5040
Chicago, IL 60637

Physician Photo

Clinical Interests

  • Thoracic Transplantation
  • Mechanical circulatory support
  • Intra-aortic balloon pump
  • Surgery for atrial fibrillation
  • Coronary artery bypass surgery
  • Valve replacement/repair

Selected Publications

View a partial list of Dr. Onsager's publications through the National Library of Medicine's PubMed online database.