Practice Locations

Children's Hospital Colorado Anschutz Medical Campus
13123 East 16th Ave Aurora, CO 80045


John S. Kim, MD

Pediatric Cardiology

Board Certified


Practice Locations

Children's Hospital Colorado Anschutz Medical Campus
13123 East 16th Ave, Aurora, CO 80045


Provider Expertise

Clinical Interest for Patients

Pediatric Cardiac Critical Care; Blood clotting, bleeding, and blood cell damage problems in Cardiology and Critical Care; Mechanical Circulatory Support (ECMO and Ventricular Assist Devices)

Care Philosophy

I strive to provide safe, effective, and precise care of children with critical cardiac disease. Such high-value care can only be delivered by ensuring excellent communication between care team members and with the patients and their families. I strive to deliver family-centered care while caring for children with some of the most complex illnesses seen in pediatric medicine.


  • Pediatrics
  • Pediatric Critical Care Medicine
  • Pediatric Cardiology

Conditions & Treatments

  • Heart and Circulation

    Adult Congenital Heart Disease, Congenital Heart Disease, Structural Heart Disease

  • Lungs and Breathing

    Pulmonary Embolism, Pulmonary Hypertension, Respiratory Disease

  • Surgery

    Cardiothoracic - Congenital Cardiac, Congenital Cardiac, Heart Transplant

  • Critical Care

  • Blood / Lymphatic System

    Clotting Disorders

Interests & Activities

Personal Interests

I am a physician-scientist trained and board certified in Pediatrics, Pediatric Cardiology, and Pediatric Critical Care Medicine. I am a cardiologist and intensivist in the pediatric cardiac intensive care unit at Children’s Hospital Colorado's Heart Institute and Associate Professor of Pediatrics at the University of Colorado School of Medicine. My area of research interest is in thrombosis, anti-coagulation, and hemolytic issues faced by children requiring surgery or extra-corporeal support for congenital and acquired heart disease. I am the primary investigator on two active protocols addressing these questions at the University of Colorado. This research interest blends into an area of specific clinical focus in the blood-related issues faced by children with critical illness. I have developed and established an inpatient consult service (Cardiac Antithrombosis Management Program, CAMP) to address the complex management of thrombotic disease in patients with acquired and congenital heart disease. In addition, I am Co-Director of the Cardiac Thrombosis Clinic, a collaboration with the Hemophilia and Thrombosis Center to provide multi-disciplinary and highly specialized outpatient care for patients with thrombosis associated with heart disease.

Education & Training

Medical Schools

MD, University of Arizona College of Medicine (2008)

Undergraduate Schools

BS, University of Arizona (AZ) (2002)

Graduate Schools

MS, University of Arizona (2004)

Residency Program

University of Maryland Program (2012)


University of Colorado (Children's Hospital Colorado) Program (2017)

University of Colorado (Children's Hospital Colorado) Program (2015)

Research & Grants


Assessment of the efficacy of the first aspirin dose in children undergoing surgery for congenital heart disease who require post-operative antiplatelet therapy (2014)

The impact of age-dependent haptoglobin deficiency on plasma free hemoglobin levels during ECMO support. (2018)

Research Interests for Patients

Hemostasis and Thrombosis in Cardiology and Critical Care; Outcomes and Complications of ECMO

information for referring providers

Referral Contact Phone


Clinical Interests for Referring Providers

Pediatric Cardiac Critical Care; Hematologic Problems in Cardiology and Critical Care; Venous Thrombosis, Anticoagulation, and Pulmonary Embolism; Mechanical Circulatory Support (ECMO and Ventricular Assist Devices)