Marianne T. Ritchie, MD is a Gastroenterologist and an Associate Professor of Medicine. After graduation from Saint Joseph’s University, she completed her medical degree at Jefferson Medical College (now Sidney Kimmel Medical College) and residency in Internal Medicine at The Lankenau Hospital in Wynnewood.
Dr. Ritchie then trained in Gastroenterology and Clinical Nutrition at Memorial Sloan Kettering Cancer Center, the world’s oldest and foremost all-cancer hospital. She returned to practice at The Lankenau Hospital and was later a faculty member at Temple University Hospital. In 2008 she joined the faculty at Thomas Jefferson University Hospital where she now teaches medical students.
Dr. Ritchie was one of the first female gastroenterologists to practice in the Philadelphia area. She has been a leading advocate for cancer prevention and women’s health for over thirty years. Ritchie developed the PINK PLUS® triple cancer screening program for women, and she also launched the BLUE LIGHTS CAMPAIGN® for Colorectal Cancer Awareness.
For four years, Dr. Ritchie was featured as the Medical Contributor on Women to Watch Media®, a weekly talk show formerly on WPHT which highlights stories of women leaders from around the world. She was also a regular contributor to PhillyVoice.com in 2021.
Dr. Ritchie is a member of national and international medical societies, the former Chair of the Women in GI Committee for the American College of Gastroenterology, and is a recognized author and public speaker.