Long Island Gastro

Gastroenterology Practice located in Syosset, NY

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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.

Services & Treatments We Offer

iv infusion

IV Infusion


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Weight Loss


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Is a procedure to identify issues in the lower part of your gastrointestinal tract.

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Are swollen veins in the anal canal that are typically harmless but may become painful.

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Abdominal Pain

Abdominal Pain

Is discomfort that arises anywhere along your digestive tract within your abdomen.

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Irritable Bowel Syndrome

Irritable Bowel Syndrome

Is a chronic intestinal disorder that develops due to dysfunction in your digestive system

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Colon Cancer Screening

Colon Cancer Screening

Screenings for cancer and other diseases are an essential component of preventive care.

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One of the most common issues that affect digestive health.

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Is a nonsurgical diagnostic procedure used to examine a person’s digestive tract.

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liver disease

Liver Disease

Your liver is the largest organ you have and assists your body with digesting food, storing energy, and removing toxins.

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Gastroesophageal Reflux Disease (GERD)

Gastroesophageal reflux disease (GERD) affects about 20% of the United States population.

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Inflammatory Bowel Disease

IBD impacts the health of nearly 1.6 million people in the United States.

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Develop when a buildup of particles occurs in the bile — a fluid your liver makes to digest fats from your diet.

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Endoscopic Retrograde Cholangiopancreatography (ERCP)

Is a procedure using upper gastrointestinal (GI) endoscopy and X-ray technology.

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Insurance Information

Long Island Gastro accepts most major insurance plans. For questions about your specific coverage, please call the office.

Empire Blue Cross Blue Shield
Health First

Hospital Affiliations

North Shore University Hospital

Northwell at Plainview

Northwell at Syosset

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

Office Hours

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