Leila C. Posch, MD

Leila C. Posch, MD, is an Assistant Professor of Pediatrics at Keck School of Medicine of the University of Southern California, and a Pediatric Infectious Diseases (ID) Specialist at Children's Hospital Los Angeles. She serves as the Medical Director of Antimicrobial Stewardship, the Co-Director of the Transplant & Immunocompromised ID (ICID) Program, and the Associate Program Director of the CHLA Pediatric ID Fellowship Program.

After earning her Doctorate in Medicine from the University of Texas Southwestern School of Medicine, Dr. Posch completed her Pediatric Internship and Residency training at McGaw Medical Center of Northwestern University/Lurie Children’s Hospital of Chicago. She then completed her Fellowship in Pediatric Infectious Diseases at the Children’s Hospital of Philadelphia before joining the ID faculty at Children's Hospital Los Angeles in 2020.

Dr. Posch’s clinical interests are in immunocompromised and transplant ID and antimicrobial stewardship, with the goal of improving the care of some of our most vulnerable and complex patients. She has a particular interest in infections in pediatric oncology and bone marrow transplant patients. Dr. Posch’s research focuses on clinical epidemiology, quality improvement, and outcomes questions related to antimicrobial and diagnostic stewardship in vulnerable, understudied, and high-risk pediatric populations, including immunocompromised patients and surgical patients. She seeks to improve how we prevent, diagnose, and treat infections in these high-risk patients and how we mitigate side effects from medications. Dr. Posch also has a strong interest in teaching and the education of students and trainees, and she enjoys mentoring and working with learners of all levels.