Ralf J. Holzer, M.D., M.Sc.
Pediatric Cardiology
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Ralf J. Holzer, M.D., M.Sc.

Pediatric Cardiology

Profile Photo of Ralf J. Holzer, M.D., M.Sc.
Accepts New Patients
Gender: Male
Language: English


Personal Statement

Quality of care, patient satisfaction and helping our patients achieve positive outcomes is at the core of my clinical work. 

Specialties and Expertise


  • Interventional Cardiology
  • Non-Invasive Pediatric Cardiology


  • Pediatric Cardiac Catheterization
  • Atrial Septal Defect
  • Ventricular Septal Defect
  • Patent Ductus Arteriosus
  • Exercise Testing
  • Tilt Table Test
  • Pediatric Echocardiography
  • Electrocardiogram (EKG/ECG)
  • Congenital Heart Disease
  • Syncope
  • Fainting
  • Postural Orthostatic Tachycardia Syndrome
  • Heart Murmur
  • Chest Pain In Children and Adolescents
  • Cardiac Arrhythmia
  • Supraventricular Tachycardia
  • Long QT Syndrome
  • Cardiomyopathy
  • Kawasaki Disease
  • Marfan Syndrome


Dr. Ralf Holzer is the Chief of the Division of Pediatric Cardiology and Director of Pediatric Cardiac Catheterization at Weill Cornell Medicine and NewYork-Presbyterian Phyllis and David Komansky Children's Hospital /Weill Cornell Medical Center. 

His own clinical focus is providing cardiac catheterization services for patients with congenital heart disease that cover the full spectrum of interventional procedures. Those include treating birth defects that cause a hole in the wall between the heart’s chambers, treating narrowed blood vessels through implantation of endovascular stents, as well as using a minimally invasive procedure to replace damaged valves. Examples of some of the procedures that Dr Holzer performs include closure of atrial septal defects, closure of ventricular septal defect, closure of patent ductus arteriosus, closure of patent ductus arteriosus in premature infants, pulmonary valve implantation, stenting of coarctation of the aorta, pulmonary artery stenting, pulmonary valvuloplasty, and aortic valvuloplasty.

He is at the forefront of establishing and evaluating innovative procedures for patients with congenital heart disease, and collaborates with interventional cardiologists and cardiothoracic surgeons. In addition, he has a strong academic focus on outcomes research, quality improvement and risk adjustment.

Dr. Holzer received his medical degree from the Johannes Gutenberg University of Mainz in Germany. He completed his residency training in Germany and the United Kingdom, and his cardiology fellowship training at the Royal Liverpool Children’s Hospital in the United Kingdom. He also completed an advanced fellowship in transcatheter interventions at the University of Chicago Children’s Hospital. Following his training, Dr. Holzer worked as a consultant in pediatric cardiology and led interventional services at the Royal Liverpool Children’s Hospital. He subsequently served for nine years as an attending physician and co-director of the cardiac catheterization laboratory at Nationwide’s Children’s Hospital in Columbus, Ohio, before moving to the Sidra Medical and Research Center in Qatar in 2014. 

Dr. Holzer has published more than 80 articles in peer-reviewed journals such as Pediatrics, Circulation, JACC, Catheterization and Cardiovascular Intervention, Pediatric Cardiology, Cardiology in the Young, and many more. He is the author of more than 20 book chapters and numerous scientific abstracts and is committed to medical education. Dr. Holzer also holds a Master of Science in Information Technology, with distinction, from the University of Liverpool.



Clinical and Academic Positions

  • Attending Pediatrician - NewYork-Presbyterian Hospital
  • Professor of Clinical Pediatrics - Weill Cornell Medical College, Cornell University
  • David Wallace-Starr Foundation Professor of Clinical Pediatric Cardiology - Weill Cornell Medical College, Cornell University
  • Professor of Pediatrics in Clinical Medicine - Weill Cornell Medical College, Cornell University

Education and Training

  • M.S., University of Liverpool (United Kingdom), 2005
  • M.D., University of Mainz Medical School (Germany), 1995


Insurance Plans Accepted

The following represents most of the managed care plans accepted by this doctor. If your insurance carrier does not appear here please contact the doctor’s office as they may have individual contracts not included on this site.

* indicates this doctor is no longer accepting new patients with this insurance plan.

  • Aetna - Weill Cornell - POS
  • Aetna-NYP - EPO/POS
  • Affinity Access
  • Affinity Health Plan
  • Amida Care
  • Emblem Select Care
  • Empire Blue Cross/Blue Shield - Blue Access
  • Empire Blue Cross/Blue Shield - Blue Connection
  • Empire Blue Cross/Blue Shield - EPO
  • Empire Blue Cross/Blue Shield - HMO
  • Empire Blue Cross/Blue Shield - Mediblue (Senior)
  • Empire Blue Cross/Blue Shield - PPO
  • Empire Blue Cross/Blue Shield HealthPlus
  • Empire Blue Cross/Blue Shield HealthPlus - CHP
  • Fidelis Care
  • GHI - CBP
  • Health First
  • Health Insurance Plan of NY (HIP)
  • Health Insurance Plan of NY (HIP) - Medicaid
  • Medicaid
  • Medicare
  • Oxford Health Plans - Metro/Core/Charter
  • Oxford Health Plans - Liberty
  • Oxford Health Plans - Freedom
  • Rockefeller University - Trustmark
  • United Empire
  • United Healthcare
  • United Healthcare - Community Plan
  • United Healthcare Compass
  • WellCare of NY
  • WorldWide Medical

Locations and Appointments

External Relationships

External Relationships

Relationships and collaborations with for-profit and not-for profit organizations are of vital importance to our faculty because these exchanges of scientific information foster innovation. As experts in their fields, WCM physicians and scientists are sought after by many organizations to consult and educate. WCM and its faculty make this information available to the public, thus creating a transparent environment.

No External Relationships Reported