David R. Freyer, DO, MS

David R. Freyer, DO, MS is Professor of Clinical Pediatrics, Medicine, and Population and Public Health Sciences at the Keck School of Medicine, University of Southern California (USC). He currently serves as Director of the Survivorship and Supportive Care Program in the Cancer and Blood Disease Institute at Children’s Hospital Los Angeles (CHLA), and as Director of the Cancer Survivorship Program and Co-Director of the Adolescent and Young Adult (AYA) Cancer Program at the USC Norris Comprehensive Cancer Center. He is founding Co-Director of the Southern California Center for Young Adult Cancer Survivorship Research, now a three-institution, multi-state research collaborative focused on all aspects of young adult cancer survivorship, including health disparities.

Dr. Freyer’s clinical care and research are concentrated in cancer survivorship, cancer control/supportive care, and AYA oncology with interests in treatment-related toxicity, survivorship care transition, cancer care disparities, and patient-reported outcomes. He continues as PI or Co-I on multiple, federally funded grants in these areas. From 2009-2019 he served as Chair of the Children’s Oncology Group (COG) AYA Oncology Discipline Committee and continues as an active investigator in this and other COG committees. In 2018, Dr. Freyer was honored with the Robert M. McAllister Faculty Mentoring Award in the Keck School of Medicine at USC. In 2023, Dr. Freyer received an NCI Director’s Award for his role in developing and implementing AYA clinical trials in the NCI National Clinical Trials Network. For numerous consecutive years, his clinical expertise has been recognized with citations in “Best Doctors in America.” In 2025, Dr. Freyer was ordained a permanent deacon for the Roman Catholic Archdiocese of Los Angeles.

• Patient Navigation for Improving Transition Success Among Multiply Disadvantaged Young Adult Survivors of Childhood Cancer
  NIH · R01CA303651 · Sep 10, 2025 – Aug 31, 2029 · Role: Principal Investigator
• Project Milestones: Young Adult Cancer Survivorship
  NIH · R01CA237230 · Jul 1, 2019 – Dec 31, 2024 · Role: Co-Principal Investigator
• CHANGE OF GRANTEE INSTITUTION: Creating and Validating Child Adverse Event Reporting in Oncology Trials
  NIH · R01CA175759 · Apr 1, 2013 – Mar 31, 2021 · Role: Co-Principal Investigator

• Orgel, Etan
• Wiemels, Joseph
• Lenz, Heinz-Josef
• Hamilton, Ann
• Matsuo, Koji
• Choi, Janet