San Diego County

3020 Children's Way
MC 5114
San Diego, CA 92123




Rady Children's Specialists of San Diego

Medical Group / IPA


Other Languages


Medical School

Flinders University of South Australia


University of Utah


University of Utah


Washington University School of Medicine

Board Certifications

Allergy/Immunology, Pediatrics


Dr. Sydney Leibel is a board-certified pediatric allergist/immunologist at Rady Children's Hospital-San Diego and an assistant professor of pediatrics at UC San Diego School of Medicine.

Dr. Leibel attended UC San Diego as an undergraduate before earning his medical degree at Flinders University in South Australia. He completed his residency in pediatrics at the University of Utah, then continued his fellowship training at Washington University in St. Louis. He completed a Master of Public Health through the University of Waterloo in Canada.

In addition to caring for allergy and immunology patients, Dr. Leibel helped develop Rady Children's Food Allergy Center and is working with the Pulmonary Medicine, Community Health Work, Psychology, Pharmacy and Social Work Departments to develop a multidisciplinary Severe Asthma Clinic. Through these clinics, he hopes to address social determinants of health and resilience in pediatric populations.

Dr. Leibel teaches medical students, residence and allergy/immunology fellows in both inpatient and outpatient settings.

A native Californian, Dr. Leibel enjoys spending time with his family, surfing and running.


Impact of climate change on paediatric respiratory health: pollutants and aeroallergens.
Domingo KN, Gabaldon KL, Hussari MN, Yap JM, Valmadrid LC, Robinson K, Leibel S

The re-emerging role of linoleic acid in paediatric asthma.
Naughten S, Ecklu-Mensah G, Constantino G, Quaranta A, Schulkers Escalante K, Bai-Tong S, Gilbert J, Leibel S, Wheelock CE, Leibel S

Allergen Content and Protease Activity in Milk Feeds from Mothers of Preterm Infants.
Luskin K, Mortazavi D, Bai-Tong S, Bertrand K, Chambers C, Schulkers-Escalante K, Ahmad A, Luedtke S, O'Donoghue AJ, Ghassemian M, Geng B, Leibel SL, Leibel SA

Mediating Role of Fine Particles Abatement on Pediatric Respiratory Health During COVID-19 Stay-at-Home Order in San Diego County, California.
Aguilera R, Leibel S, Corringham T, Bialostozky M, Nguyen MB, Gershunov A, Benmarhnia T

Dose-dependent association between inhaled corticosteroid use and risk of obesity and metabolic syndrome in asthma.
Wangberg H, Mortazavi D, Kitsen J, Sanni A, Leibel S, Geng B

Patterns of allergenic food introduction in Los Angeles inner-city children.
Kwong KY, Chen E, Tran P, Leibel S, Masood M, Boyle S, Scott L

A Perspective on Pediatric Respiratory Outcomes During California Wildfires Due to Smoke and PM(2.5) Exposure.
Naughten SM, Aguilera R, Gershunov A, Benmarhnia T, Leibel S

The impact of maternal asthma on the preterm infants' gut metabolome and microbiome (MAP study).
Bai-Tong SS, Thoemmes MS, Weldon KC, Motazavi D, Kitsen J, Hansen S, Furst A, Geng B, Song SJ, Gilbert JA, Bode L, Dorrestein PC, Knight R, Leibel SA, Leibel SL

Fine Particles in Wildfire Smoke and Pediatric Respiratory Health in California.
Aguilera R, Corringham T, Gershunov A, Leibel S, Benmarhnia T

Two pediatric cases of ANCA-negative eosinophilic granulomatosis with polyangiitis successfully treated with dupilumab.
Galant-Swafford J, Geng B, Leibel S, Akuthota P, Tucker S, Cernelc-Kohan M, Sheets R, Nation J, Jefferson AA

Screening Social Determinants of Health in a Multidisciplinary Severe Asthma Clinical Program.
Leibel S, Geng B, Phipatanakul W, Lee E, Hartigan P

Increase in Pediatric Respiratory Visits Associated with Santa Ana Wind-Driven Wildfire Smoke and PM(2.5) Levels in San Diego County.
Leibel S, Nguyen M, Brick W, Parker J, Ilango S, Aguilera R, Gershunov A, Benmarhnia T

Estimating Cost-Effectiveness of Confirmatory Oral Food Challenges in the Diagnosis of Children With Food Allergy.
Alsaggaf A, Murphy J, Leibel S

Utilizing a Physician Notification System in the EPIC Electronic Medical Record to Improve Pediatric Asthma Control: A Quality Improvement Project.
Leibel S, Weber R

Effect of inhaled corticosteroid use on weight (BMI) in pediatric patients with moderate-severe asthma.
Han J, Nguyen J, Kim Y, Geng B, Romanowski G, Alejandro L, Proudfoot J, Xu R, Leibel S

Attention-deficit/hyperactivity disorder stimulant medication reaction masquerading as chronic cough.
Leibel S, Bloomberg G

Update on allergen immunotherapy for treatment of allergic diseases.
Kwong KY, Leibel S

Human immunodeficiency virus type 1 Vpr protein does not modulate surface expression of the CD4 receptor.
Argañaraz E, Cortés MJ, Leibel S, Lama J

See the full listing of this physician's publications on PubMed, a service of the National Library of Medicine.

PubMed is a third-party website and not affiliated with Rady Children's Hospital-San Diego.

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