Our Fellows

First Year

Megan Hennessey, MD

I grew up in Chelmsford Massachusetts and have spent most my life in New England, aside from the 4 years I lived in DC when I was in medical school at George Washington University. I completed my internal medicine residency at Dartmouth and was won over by the collegial atmosphere at the hospital and the natural beauty of the upper valley, and was thrilled to be able to stay for GI fellowship. I’m planning on pursuing general GI with areas of interest in immune mediated conditions and medical education. Outside of the hospital I enjoy growing flowers and vegetables in our garden, cooking, skiing with my husband, hitting the local trails, and exploring the upper valley to find the best secret swimming spots.

Jamie Horrigan, MD

I grew up in Hopkinton, Massachusetts where the Boston Marathon starts. I then moved to New York as part of the Siena College/Albany Medical College early assurance medical program which focused on service, the humanities, and ethics to create more compassionate physicians. During my fourth year of medical school, I did an away rotation at Dartmouth Hitchcock Medical Center in GI and absolutely loved the people, the area, and the beautiful hospital. It was an easy decision to rank Dartmouth Hitchcock Medical Center #1 for residency. I then stayed on for a chief year and was thrilled to match into GI fellowship here. Within GI, my interests are in inflammatory bowel disease (IBD). Outside of medicine, I enjoy anything water related in the summer, especially waterskiing and paddle boarding, downhill skiing in the winter, trying new recipes, and going for long walks. My husband and I live in Lebanon with our 2 cats, Leo and Luna.

Second Year

Obaida Dairi, DO

Born in the Hartford, Connecticut and raised in the suburbs of Chicago (but a die-hard Green Bay Packers fan!), I moved back to New England and up to Dartmouth for my internal medicine residency. I then completed a Chief year and stayed on for GI fellowship! In my free time I love to spend time with my wife and son, spend time in the outdoors, play soccer, grill up new recipes, and check out the breweries! Feel free to reach out with questions: obaida.dairi@hitchcock.org

Lauren Eichenwald, MD

I was born in Southern California and majored in mathematics at Bowdoin College in southern Maine, where I completed an honors thesis on developing a mathematical model of lobster heart contraction. After college, I spent 2 years conducting biophysics research at Johns Hopkins University before pursuing a career in medicine. I earned my medical degree from Drexel University in Philadelphia and completed my internal medicine residency at Tufts Medical Center in Boston. My clinical interests include hepatopancreaticobiliary disorders, eosinophilic esophagitis, and inflammatory bowel disease. Outside of work, I enjoy spending time with my one-year-old, playing soccer, running, baking, and painting.

Third Year

Hannah Systrom, MD

Originally from the Boston area, I moved to New Hampshire for medical school at Geisel where I fell in love with the Upper Valley. I did my internal medicine residency at Beth Israel Deaconess Medical Center in Boston, but immediately returned to Dartmouth for fellowship. I have enjoyed staying involved in the medical school on the admissions committee and teaching small groups. I grew up playing ice hockey through college and continue to play here, and have had a blast coaching the Hanover High School Girls Hockey team. I also love to ski and hike in the area. I am very excited to be staying on as faculty next year!

Sara Zelman, MD

I grew up on Long Island, New York. I went to medical school in Albany and this is where I met my husband! We then couples matched to residency at Tufts in Boston and then again couples matched to different fellowships here at Dartmouth as we wanted a chance to get out of the city. I love hiking, riding the peloton, traveling to new cities, and just hanging out with my husband, dog Yoda, and son Henry.