A middle-aged man with short, brown hair and blue eyes, smiling, wearing a black suit jacket and white shirt, against an indoor background with blurred lighting.

Meet Richard Feldstein MD

Dr. Richard Feldstein is a board-certified gastroenterologist and internal medicine physician with over two decades of experience providing comprehensive patient care. He specializes in the diagnosis and treatment of conditions affecting the digestive system, including the stomach, intestines, liver, and related organs. His background in internal medicine allows him to take a holistic approach, understanding how digestive health impacts overall wellness.

Dr. Feldstein earned his medical degree from St. George’s University and completed his residency training at St. Luke’s–Roosevelt Hospital Center. He is affiliated with St. Catherine of Siena Medical Center and provides care at multiple convenient locations in Commack and Smithtown, New York. He also performs specialized procedures at North Shore Surgi Center.

Fluent in both English and Spanish, Dr. Feldstein is committed to delivering accessible, patient-centered care to the diverse communities he serves across Long Island.

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  • "Dr. Feldstein is an incredible doctor who truly cares for his patients. I felt completely at ease knowing I was in good hands. He is a compassionate and knowledgeable physician. Highly recommended!"

    —Daniella Y.

  • "Since switching my prior gastro dr & now with Dr. Feldstein, this was the best choice I have made! From the time I came into his office as a new patient, I was treated with the upmost professional care. He has an excellent bed side mannor, very caring, thorough & attentive to a patients needs. My GI issues are in control now. Highly recommend him!""

    —Jennifer A.

  • "Before writing my review I’d like to start off with a Five Star review. Just when you start to lose all hope in the medical industry and question does your Doctor truly care? I will say I was blessed enough to meet someone as caring and amazing as Dr. Richard Feldstein. I was giving up hope to try and figure out what has been going on with my health. Meeting Dr. Feldstein and his staff from my first appointment I was impressed with the utmost caring and professionalism. Dr. Feldstein, spent time with me to explain his concerns and his outlined solutions to get me up to par again. I was admitted to the hospital through the ER and what was truly amazing is that Dr. Feldstein had come to check on me since the day I came and in and in person too and on the weekend ! You do not find this level of care these days. I would highly recommend Dr.Feldstein , truly a Doctor, who took his oath and I truly believe goes above and beyond his call of duty.His compassion and great gift to heal and help not only his patients it goes further than that."

    —Donna D.

  • "Great doctor do great job thank you"

    —Bassam Z.