UCI/CHOC Pediatric Urology Fellowship Program

The Pediatric Urology Fellowship at The University of California, Irvine (UCI) and CHOC is a two-year program that consists of one year of clinical pediatric urology training and is accredited by the American College of Graduate Medical Education (ACGME) followed by one year of research, which is currently non-ACGME accredited. We offer opportunities in clinical research at CHOC and in basic science through collaboration with UCI.

Pediatric urology fellows work closely with our faculty members in a busy pediatric urology practice. Our four physicians and four nurse practitioners see approximately 900 patients in clinic each month. As a group, we perform approximately 1,200 surgical cases annually. Fellows are involved in a majority of the surgical cases.

Contact Us

UCI/CHOC Pediatric Urology Fellowship Program
505 S. Main St
Orange, CA 92868

Cherry Pattamakom
Pediatric Urology Fellowship Program Coordinator
Ph (714) 509-3914

Program Leadership

Heidi A. Stephany, MD
Associate Professor of Urology

Fellowship Program Director

CHOC Urology Program, Top-Ranked in US

CHOC Urology ranked Best Children's Hospitals

CHOC Urology Program is ranked in the top 30 for Best Children’s Hospitals by U.S. News & World Report 2020-21. The Best Children’s Hospitals rankings were introduced by U.S. News in 2007 to help families of children with rare or life-threatening diseases find the best medical care available. Only the nation’s top 50 pediatric facilities earn recognition as a best children’s hospital by U.S. News & World Report.

Program Overview

The first year of fellowship is primarily a clinical year. Our fellows operate three to four days per week and typically perform 900 cases during their first year. We offer a well-rounded surgical experience, including robotic-assisted and pure laparoscopic surgeries, in addition to complex reconstructive cases. Our fellows participate in multi-disciplinary academic conferences including disorders of sexual development, tumor board, and urology/nephrology/radiology conference. Fellows also participate in our multidisciplinary spina bifida clinic and are actively involved with our video urodynamic studies. In addition, weekly Grand Rounds are held in conjunction with our UCI adult colleagues where many pediatric lecturers are highlighted. Our monthly Quality Assurance and Peer Review and journal club is also held in coordination with the UCI residency program.

The first-year fellow works closely with UCI urology residents to manage our pediatric urology service. Currently, there is one resident on the service with the fellow. Beginning in 2021, there will be two residents on the service, a junior and senior resident. Residents take all primary call; with the fellow serving as back-up to the junior resident on call.
We offer a fully funded research year in which our fellows can pursue basic science or clinical research. We have a robust clinical research team at CHOC led by a full-time clinical epidemiologist, Carol Davis-Dao, Ph.D. In addition, many UCI medical and undergraduate students assist in database management and data entry. Our group also participates in multi-institutional research studies, as well as clinical trials.

For fellows interested in basic science research, we have opportunities with the UCI School of Medicine. We collaborate with Joshua Mauney, Ph.D., a faculty member in our UCI Urology department, who focuses on tissue engineering with the development of silk biomaterials for repair of visceral hollow organs. Dr. Mauney has a productive basic science laboratory with NIH grant funding.

During the second year, the fellow will continue to have clinical accreditation and be involved in complex reconstruction cases. The second-year fellow will also learn how to guide junior residents through surgical cases. An additional global health rotation is offered to the second-year fellow where the fellow can travel with Dr. Heidi Stephany on one of her semi-annual mission trips through the non-profit organization of International Volunteers in Urology Med (IVUMed).
Joshua Chamberlin, MD
Ahmed Abdelhalim, MD
Peter (Zhan Tao) Wang, MD
Orchid Djahangirian, MD
Guy Hidas, MD


Our four world-renowned fellowship-trained pediatric urologists are held at the highest regard for their skills as surgeons and health providers.

Khoury, Antoine “Tony” E. MD

Specialty: Urology
Appointments: 888-770-2462
Office: 714-509-3919

Dr. Khoury, chief of pediatric urology at both CHOC and UC Irvine Medical Center, treats kids and teens in Orange County.

Wehbi, Elias MD

Specialty: Urology
Appointments: 888-770-2462
Office: 714-509-3919

Dr. Elias Wehbi is a urologist who treats infants, kids and teens with urology disorders at CHOC in Orange.

Chuang, Kai-Wen MD

Specialty: Urology
Appointments: 888-770-2462
Office: 714-509-3919

Dr. Kai-Wen Chuang is a urologist who treats infants, kids and teens with urology disorders at CHOC Hospital in Orange.

Stephany, Heidi A. MD

Specialty: Urology
Appointments: 888-770-2462
Office: 714-509-3919

Dr. Stephany is board certified in urology with a subspecialty in pediatric urology and treats kids and teens in Orange County.