About Long Island Gastro

Long Island Gastro is a comprehensive gastroenterology practice serving the men and women of Syosset, Long Island, New York. In 2009, Jaydeep Kadam, MD, and Kostas Sideridis, DO, realized that the residents of Long Island lacked comprehensive digestive health services in their own neighborhood. As friends and co-workers, they set out to found Long Island Gastro to provide expert gastrointestinal treatment paired with high-quality patient care. Currently, patients can find compassionate care and a variety of effective treatments from the professional and skilled experts at Long Island Gastro. 

The team at Long Island Gastro uses only the most advanced techniques and technology to ensure that patients receive a proper diagnosis and the best treatment available. Patients who seek assistance from Long Island Gastro feel welcomed at the state-of-the-art facility and can be confident that their needs are the top priority. The team of health care professionals offers personalized care and is dedicated to getting to know and understand each of their patients as individuals with specific needs. The team is committed to promoting good health, helping patients prevent disease, and educating them on health matters.

The team at Long Island Gastro is available to assist with nearly any gastrointestinal issue regardless of the time or day of the year. They remain open and fully staffed around the clock and on holidays to instill the people of Long Island with the confidence that they can always receive the care and attention they need. Any bouts of abdominal pain, colon cancer screenings, and endoscopies can all be cared for on-site. 

For compassionate and practical assistance with any gastrointestinal issues, make an appointment either online or by calling the office of Long Island Gastro today.


Long Island Gastro
121 Eileen Way
Syosset, NY 11791
Phone: 516-584-6400

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