- American Board of Internal Medicine – Internal Medicine, 1996
- American Board of Internal Medicine – Gastroenterology, 1999
- American Gastroenterological Association
- American Society for Gastrointestinal Endoscopy
- American College of Gastroenterology
- Along with general gastrointestinal issues, Dr. Losurdo has special interest in Inflammatory Bowel Disease and Eosinophilic Esophagitis.