Request an Appointment:
Online or Call 1-888-824-0200

Gerhard Ziemer, MD, PhD

Professor of Surgery

Director, Pediatric Cardiac Surgery

Director, Adult Congenital Heart Surgery

Co-Director, Chicago Pediatric Heart Center

Gerhard Ziemer, MD, PhD, specializes in a wide range of congenital cardiac surgery procedures, including complex, primary, and multi-stage repair in newborns, as well as primary and repeat surgeries in adults with congenital heart defects. Dr. Ziemer has expertise in homograft and autograft valve replacements in all age groups, and in trachea resections and reconstructions in newborns. He has performed more than 4,000 congenital heart surgeries in children and adults. In 1989, Dr. Ziemer did the first successful neonatal autograft aortic valve replacement (Ross operation) in the world.

While primary repair of congenital heart disease in neonates and small children is the focus of Dr. Ziemer's practice, his additional training and former practice in adult aortic surgery makes him especially qualified for the surgical treatment of adults with congenital heart disease.

Dr. Ziemer has been involved in many international scientific societies, academic boards, and charity activities throughout his career. He served on the founding governing council of the World Society for Pediatric and Congenital Heart Surgery and was member of the scientific board of the German Pediatric Heart Center Foundation. He was the first president of the European Congenital Heart Surgeons’ Association and currently serves as a board member. Additionally, Dr. Ziemer travels to Lima, Peru for two weeks each year to operate on children with congenital heart disease and to educate Peruvian colleagues on the latest techniques for pediatric heart surgery.

Practice Locations

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

Comer Children's Hospital at the University of Chicago
5721 S. Maryland Avenue
Chicago, IL 60637

Duchossois Center for Advanced Medicine
5758 S. Maryland Avenue
Chicago, IL 60637

Year Started Practice


Board Certifications

General Surgery (Germany)
Cardiothoracic Surgery (Germany)
Vascular Surgery (Germany)
Surgical Intensive Care (Germany)

Medical School

Kiel University Medical School


Kiel University Teaching Hospital


Hannover Medical School Hospital, Lower Saxony, Germany
Boston Children's Hospital


Boston Children's Hospital

Additional Graduate Degree

PhD, Hannover Medical School, Hannover, Germany


American Association for Thoracic Surgery
Congenital Heart Surgeons’ Society
European Association for Cardiothoracic Surgery
European Congenital Heart Surgeons' Foundation
German Society for Cardiothoracic and Vascular Surgery
German Society for Surgery
Society of Thoracic Surgeons
World Society for Pediatric and Congenital Heart Surgery

Languages Spoken



Office Phone

(773) 702-2500

Office Fax

(773) 702-0840

Office Postal Address

Gerhard Ziemer, MD, PhD
The University of Chicago Medicine
5841 S. Maryland Avenue, MC 4050
Chicago, IL 60637

Physician Photo

Clinical Interests

Request an appointment online
or call UCM Connect at

Learn More About Dr. Ziemer

For the past 17 years, Dr. Ziemer has visited Peru once or twice each year for a hectic week performing cardiac surgery on children at the Instituto Nacional de Salud del Niño.

Selected Publications

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