Pediatric Gastroenterology, Hepatology, and Nutrition Current Fellows and Alumni

1st Year Fellows

2nd Year Fellows

  • Melissa Castro Rivadeneira, MD

    2nd Year Fellow
    Pediatric Gastroenterology, Hepatology, and Nutrition

    Residency: Nicklaus Children's Hospital (Miami, FL)
    Medical School: Universidad Científica del Sur Facultad de Medicina Humana (Lima, Peru)

  • Kacie Denton, MD, MPH

    2nd Year Fellow
    Pediatric Gastroenterology, Hepatology, and Nutrition

    Chief Resident: East Tennessee State University (Johnson City, TN)
    Master of Public Health: East Tennessee State University (Johnson City, TN)
    Medical School: East Tennessee State University Quillen College of Medicine (Johnson City, TN)
    Undergraduate: Carson-Newman University (Jefferson City, TN)

3rd Year Fellows

  • Derek Armstrong, MD

    3rd Year Fellow
    Pediatric Gastroenterology, Hepatology, and Nutrition

    Residency: Texas Children's Hospital/Baylor College of Medicine (Houston, TX)
    Medical School: Frank H. Netter MD School of Medicine at Quinnipiac University (Hamden, CT)
    Undergraduate: University of California (San Diego, CA)

  • Nikita Lalchandani Day, MBBS

    3rd Year Fellow
    Pediatric Gastroenterology, Hepatology, and Nutrition

    Residency: Louisiana State University (New Orleans, LA)
    Medical School: University of Queensland (Brisbane, Australia)
    Undergraduate: University of California (Berkeley, CA)

  • Catherine Marchetta, MD

    3rd Year Fellow
    Pediatric Gastroenterology, Hepatology, and Nutrition

    Residency: Thomas Jefferson University/Nemours Children's Health (Philadelphia, PA and Wilmington, DE)
    Medical School: Cooper Medical School of Rowan University (Camden, NJ)
    Undergraduate: Wellesley College (Wellesley, MA)

Pediatric Gastroenterology, Hepatology, and Nutrition Fellowship Alumni (2020-2024)

2024

  • Jordan Busing, MD: Assistant Professor of Pediatrics, D. Brent Polk Division of Pediatric Gastroenterology, Hepatology, and Nutrition; Vanderbilt University Medical Center

2023

  • Matthew Buendia, MD: Instructor in Pediatrics, D. Brent Polk Division of Pediatric Gastroenterology, Hepatology, and Nutrition; Vanderbilt University Medical Center
  • Derica Sams, MD: Pediatric Gastroenterologist, Pediatric Digestive Health and Wellness, Duluth, GA

2022

  • Katherine Black, MD, MPH: Assistant Professor of Pediatrics, Division of Pediatric Gastroenterology, Hepatology and Nutrition; Emory University School of Medicine, Atlanta, GA
  • Lauren Klein, MD: Instructor in Pediatrics, D. Brent Polk Division of Pediatric Gastroenterology, Hepatology, and Nutrition; Vanderbilt University Medical Center

2021

  • Rachel Bernard, DO, MS: Pediatric Gastroenterologist, Ochsner Hospital for Children Pediatric Gastroenterology, Hepatology and Nutrition; Baton Rouge, LA
  • Conrad B. Cox, MD: Pediatric Gastroenterologist, GI for Kids & East Tennessee Children’s Hospital, Knoxville, TN

2020

  • Aimée Caillet, MD: Pediatric Gastroenterologist, Our Lady of the Lake Children's Health Gastroenterology, Baton Rouge, LA
  • Amanda Lee, MD, MEd: Assistant Professor of Pediatrics, Division of Gastroenterology, OHSU Doernbecher Children’s Hospital, Oregon Health & Science University, Portland, OR