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About Jonathan Rieber, MD

Dr. Rieber combines state-of-the-art medicine with cutting-edge technology (typically seen at elite hospitals). Providing some of the highest-level care for gastrointestinal, liver disease and colorectal cancer prevention, detection and screening in the Broadway area. At the same time, we stay committed to providing professional, personal and compassionate care while obtaining complete patient satisfaction and comfort during the patient’s visit.

Dr. Rieber says his greatest professional joy is caring for people– to find that subtle problem that may have been missed by another physician, or performing an endoscopic procedure that might remove a cancer or help someone avoid a more invasive treatment such as surgery. For over a quarter century, and over tens of thousands of endoscopic procedures, Dr. Rieber has treated each patient as if he or she were family.


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Colonoscopy

A colonoscopy is now the gold standard used to detect or prevent individuals from getting colon cancer. Adults starting at age 45 years are strongly recommended to have a colonoscopy or some other test to screen for colon cancer.

Capsule Endoscopy

During the procedure, a patient swallows a vitamin-sized pill with a camera inside (pill camera). Transported smoothly and painlessly through the GI tract by the body’s own natural peristalsis, the video pill capsule transmits images of different parts of your intestine, such as the small intestine and the esophagus.

ERCP

An endoscopic retrograde cholangiopancreatography, more commonly known as ERCP, is an endoscopic procedure that is also combined with X-rays. ERCP is very much like a typical upper GI endoscopy; however, your gastroenterologist will inject a dye during the procedure, which highlights problems in certain digestive organs through X-ray technology.

Flexible Sigmoidoscopy

A sigmoidoscopy is an internal exam of the lower part of the large intestine (colon) using a short, thin, flexible, lighted tube with a camera at the tip. This procedure helps determine the cause of abdominal pain, rectal bleeding, changes in bowel habits, chronic diarrhea, and other intestinal problems.

Hemorrhoid Treatments

Two of the most common treatments for hemorrhoid removal are hemorrhoid banding, which cuts off blood flow to the hemorrhoid, and infrared coagulation (IRC) therapy, which uses infrared light to shrink and shrivel hemorrhoids. The treatment method depends highly upon whether the hemorrhoids are external (around the anus) or internal (in the rectum).

Upper Endoscopy

An endoscopy is a very common and safe procedure that is used to examine the esophagus, stomach, and upper part of the small intestine, known as the duodenum, to get a closer look at what may be causing symptoms.

Celiac Disease

Celiac disease is an autoimmune disease where a patient’s immune system abnormally responds to the ingestion of gluten. It is estimated that 1 in 100 people worldwide is affected by celiac disease. However, up to 2.5 million people in the United States may have celiac disease and not know it, as the symptoms range from mild to severe.

Constipation

Constipation is defined as having a bowel movement fewer than three times per week. With constipation, stools are usually hard, dry, small in size, and difficult to eliminate. Some people who are constipated find it painful to have a bowel movement and often experience straining, bloating, and the sensation of a full bowel.

GERD

Gastroesophageal reflux disease (GERD) is a more serious form of gastroesophageal reflux (GER) which is common. GER occurs when the lower esophageal sphincter (LES) opens spontaneously, for varying periods of time, or does not close properly, and stomach contents rise up into the esophagus.

Hemorrhoids

Hemorrhoids are swollen veins in the anal canal. This common problem can be painful and can be caused by too much pressure on the veins in the pelvic rectal area. Normally, tissue inside the anus fills with blood to help control bowel movements, but if you strain or sit on the toilet a long time to move stool, the increased pressure causes the veins in this tissue to swell and stretch.

Inflammatory Bowel Disease + Crohn's Disease & Ulcerative Colitis

Inflammatory bowel disease (IBD) encompasses a set of gastrointestinal diseases where parts of the digestive tract are chronically inflamed by a dysfunctional interaction immune system. Hereditary factors and an abnormal interaction between microorganisms and the immune system are felt to play a role.

Irritable Bowel Syndrome

It is estimated that 10 to 15 percent of Americans have Irritable Bowel Syndrome (IBS). IBS is a functional GI disorder that refers to a group of symptoms that affect the digestive tract, often resulting in abdominal pain, bloating, or cramping. However, some people with IBS have no symptoms at all.

What Our Patients Say About Us

An incredible Doctor— so caring, so thorough, and great bedside manner. Dr Rieber really took his time with me, and made me feel very comfortable and confident in his treatment plan. He was the only doctor who could formulate a proper, and successful, plan for my health. I am a patient for life. Thank you so much, Doctor!
Andrea
Andrea
We found the staff to be incredibly helpful and generous with their time. Dr. Rieber took his time during the consultation and asked wonderful questions. I respect his expertise and affable manner...which truly rung genuine. The office was spacious with a comfortable waiting areas and access to clean bathrooms. Lovely location in Inwood adjacent to green space and several restaurants. Thanks!
DJF
DJF
Dr. Rieber is an excellent gI doctor no complaints whatsoever he’s very knowledgeable and thorough takes his time to listen to you!
Elizabeth
Elizabeth
Dr. Rieber has taken care of my mom and my partner. He has a great bedside manner and is cutting edge with his practice.
Antoinette
Antoinette
I have been to many gastro doctors over the years. Dr. Rieber was the first doctor to think outside of the box. He listens, he asks intelligent questions and he is open to patient input.
Lisbeth
Lisbeth

Blogs
Ulcers

Signs of Stomach Ulcers

Stomach ulcers, also known as peptic ulcers, are painful sores that develop in the lining of the stomach or the first part of the small intestine. These ulcers can cause

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June 18, 2026
Diet

Will a Low-Carb Diet Help My IBS?

A low-carb diet may offer relief for those struggling with irritable bowel syndrome (IBS), a condition characterized by abdominal pain and altered bowel habits. While many individuals seek dietary solutions

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June 14, 2026
GERD

Health Complications Linked to GERD

GERD, or gastroesophageal reflux disease, is a prevalent condition affecting millions worldwide. Characterized by chronic symptoms like heartburn and acid reflux, GERD can lead to significant health complications if left

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June 10, 2026
Constipation

How to Prevent Constipation from IBS

Constipation is a common challenge for those with irritable bowel syndrome (IBS), particularly the IBS-C subtype. This condition affects millions globally, significantly impacting daily life. Understanding how to manage constipation

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June 3, 2026

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