Dr. Kathy Van Leeuwen is a native of Phoenix, AZ, was born at Maryvale Hospital and went to Moon Valley High School. She has been a practicing pediatric surgeon in the Phoenix area since 2005. Dr. Van Leeuwen received her doctorate of medicine from Columbia College of Physicians and Surgeons and completed her general surgery training at the University of Michigan in Ann Arbor where she was also the administrative chief resident. She continued her training with The University of Michigan Hospitals, C.S. Mott Children's Hospital, for her fellowship in pediatric surgery.

Dr. Van Leeuwen is the Director of the Reproductive Anomalies/Disorders of Sexual Development at Phoenix Children's Hospital, a multidisciplinary clinic that serves the complex needs of patients with congenital malformations of the reproductive system. She is also the Director of the Arizona Fetal Care Network (AZFCN). AZFCN is the only program in Arizona offering advanced fetal diagnosis and newborn medical and surgical intervention, all at one location. She is highly regarded by her peers for her ability to coordinate the care for the clinic's patients and their families.

Dr. Van Leeuwen understands the relevance of research in her field and as such is the Primary Investigator on several IRB approved studies including a patient registry for disorders of sexual development, a study involving non-cardiac surgery on uni-ventricular pediatric patients, and a multi-center trial investigating the care of children with blunt renal trauma.

Her community work includes the Speakers Bureau for the Arizona Affiliate of the Partnership for a Drug Free America where she has made several television appearances, written an article for Arizona Medical Association magazine, and was also a key contributor to the web-based video segments for DrugFreeAZ.org.

Dr. Van Leeuwen has the distinction of performing the first thoracoscopic repair of a congenital diaphragmatic hernia (CDH) in Phoenix at Phoenix Children's Hospital in May, 2007. She has been named a Top Doctor by Phoenix magazine in 2009, 2013, 2014, and 2015. She's been included in Best Doctors in America database since 2007, and was voted by Mayo Clinic Arizona residents as Community Educator of the Year in 2011.