David de Gijsel, MD, MSc, MPH

Dr. Jeffrey Parsonnet is a distinguished specialist in Infectious Disease and International Health, affiliated with Dartmouth Health. His areas of focus include HIV/AIDS, Lyme disease, post-acute COVID syndrome, and various staphylococcal infections. With a robust educational background, Dr. Parsonnet completed his medical degree at New York University School of Medicine and furthered his training through residency and fellowship programs at Yale University Hospitals and Beth Israel Hospital, respectively. He holds board certifications in Internal Medicine and Infectious Disease, and has been a faculty member at the Geisel School of Medicine since 1990. Generated from the website

Although I was fortunate to have the opportunity to complete residency and fellowship training in New York City, I was born and raised in New Hampshire and love being back in this area, raising my kids, and having the privilege of taking care of patients in New Hampshire and Vermont. I enjoy working in the field of allergy and immunology because we care for a wide variety of age groups. We can get to know and follow the allergic conditions of entire families, which is very rewarding. Also, this is a particularly exciting time to be working in this field because it is evolving so much. New medications and therapies are emerging that help us improve the quality of care we provide for our patients. Asthma and allergies can be very stressful for everyone. The difficulty in breathing that can come with asthma can be scary for children, and sometimes even more so for their parents. I want my patients to know that I’m here to help them to get their disease under control and to help them stay healthy, so that those stressful moments are fewer and farther between. It’s so rewarding to see patients make progress, whether it’s seeing them outgrow their food allergies so that they can enjoy a food again, or getting their allergies or asthma under control so that they can get back to feeling good and doing what they want to do.

As an engaged listener with a compassionate bedside manner, my goal is to help my patients enjoy their best health throughout their lives. For patients who come to me with gynecological conditions, I help them return with confidence to their daily activities, whether that means not having to worry about abnormal bleeding or their bowel or bladder function, or being able to engage in intimate relationships without pain or other concerns. For my pregnant patients, I provide guidance for a safe passage for both mother and newborn. I believe that the transition to motherhood is a natural transition and a personal journey for each woman. My job is not to intervene but to make sure that everyone is healthy and happy in the end.