Dr. Marco Melis, a fellowship-trained, board-certified surgical oncologists works closely with medical and radiation oncologists, gastroenterologists, radiologists and other specialists to deliver state-of-the-art, individualized cancer care. Dr. Melis specializes in minimally invasive robotic cancer surgery Conditions treated by Dr. Melis: Adrenal tumors Colon and rectal cancer Esophageal cancer Familial cancers Gallbladder and bile duct cancer Hereditary gastric cancer Hereditary pancreas cancer Intestinal (small bowel) cancer Lynch syndrome cancers Metastatic liver cancer (from colorectal cancer as well as from other sites) Neuroendocrine tumors (sometimes called carcinoid tumors) Pancreas cancer Pancreas cysts Peritoneal surface cancers (sometimes called carcinomatosis) Primary liver cancer (hepatoma or hepatocellular carcinoma) Premalignant conditions Retroperitoneal tumors (including sarcoma) Spleen abnormalities Stomach (gastric) cancer

Patient reviews

All reviews have been submitted by patients after interacting with the practice.

Overall rating

4.89

Wait time

4.69

Bedside manner

4.88

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148 reviews

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Doctor was good, office was clean and the staff was very friendly.

April 25, 2025Nigel H.Verified patient

May 17, 2026luis C.Verified patient

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July 11, 2025Ethan K.Verified patient

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Dr Weitzen was such an amazing surgeon. He has the best bedside manner, does a great job of explaining the procedure, recovery and equipping you with all the necessary information. During my interactions with him I was always treated with kindness, compassion and respect.

June 29, 2026Initials hidden

Yes, I would go back

April 10, 2025Phocus N.Verified patient

Highly recommend

September 16, 2024Lizette R.Verified patient

I recently had the pleasure of being treated by Dr. Weitzen for a cyst removal procedure. From the moment I met him, I was impressed by his approachability and professionalism. Dr. Weitzen explained the entire process clearly and addressed all my concerns with patience and understanding. The procedure itself was handled with exceptional care and precision, resulting in a swift and successful removal. His friendly demeanor made the entire experience much more comfortable than I anticipated. I highly recommend Dr. Weitzen to anyone seeking a skilled and compassionate surgeon.

April 29, 2024Steven H.Verified patient

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January 7, 2026Rose F.Verified patient

December 17, 2025Dominic F.Verified patient

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October 9, 2025Initials hidden

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