Your Trusted Team of Gastroenterologists

Our Locations Book Appointment

About Rochester Gastroenterology Associates

Rochester Gastroenterology Associates is a leading provider of comprehensive digestive health services, proudly serving patients throughout the Greater Rochester region. Our practice is built on a foundation of clinical excellence, compassionate care, and a commitment to advancing the field of gastroenterology.

We offer a full spectrum of diagnostic and therapeutic services, including advanced endoscopy, colon cancer screening, management of inflammatory bowel disease, liver disease evaluation, and treatment for a wide range of gastrointestinal conditions. Our team works collaboratively to provide individualized care plans tailored to each patient’s unique needs, ensuring they receive the highest quality of care in a comfortable and supportive environment.

Bravo pH Study

This new technology allows physicians to accurately measure acid reflux for 48 hrs in the esophagus and correlate the acid level in the esophagus with the symptoms. Patients will be asked to keep a daily recording of events such as eating, drinking and lying down. Patients should also mark when and if they have any of these symptoms such as heartburn, chest pain, cough or regurgitation.

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.

Esophageal Manometry

Esophageal manometry is a test used to measure the function of the esophagus, namely its peristalsis (sequential muscular contractions that propel food and water down the esophagus) and lower esophageal sphincter (the valve that prevents reflux of gastric acid into the esophagus).

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 Banding

Hemorrhoid banding is an outpatient, nonsurgical procedure where healthcare providers use a suction device to remove internal hemorrhoids. A small rubber band is placed around the base of an internal hemorrhoid. The banding ensures that nerve endings do not feel pain during the procedure. Hemorrhoid banding is very quick and is often completed within one to two minutes.

Video Capsule Endoscopy

If your gastroenterologist suspects there may be an issue and needs to look at your digestive tract, they may order a diagnostic procedure known as video capsule endoscopy. A small wireless camera is contained inside the capsule, which you swallow. It is a non-invasive way for your healthcare provider to see the inner workings of your gastrointestinal tract. Once you swallow the capsule, the miniature camera will take thousands of pictures for your physician to evaluate.

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.

Diet & Nutrition

Nutrition plays a paramount role in gastroenterology as it directly influences the health and functioning of the digestive system. We have nutritional resources available to help understand the role adequate nutrition plays in preventing and managing various digestive disorders.

Fibroscan

We offer FibroScan in our office, a non-invasive diagnostic device designed to measure the elasticity of liver tissue and detect fibrosis. A fibroscan allows us the ability to provide a non-surgical alternative to a traditional liver biopsy. We are able to present the results to patients in real-time and make treatment plan recommendations

Infusion Therapy

Infusion Therapy is a medication used to treat inflammatory bowel disease(IBD), which includes Crohn’s disease and ulcerative colitis (UC). It is not a first-line treatment method for IBD but instead a medication given to patients who haven’t responded to more common IBD treatments. Patients require infusions approximately three to six times a year, depending on the type of medication. Infusion Therapy works well at arresting symptoms and reducing disease severity, sometimes putting IBD into remission.

What Our Patients Say About Us

Sarah Pratt NP and Dr. Chodos were amazing and gave me great care. I had transferred from another Gastro place after multiple visits with multiple doctors there and still wasn't getting help. After one visit at RGA, my stomach pain was figured out and I still be forever grateful for them!

Kari

I recently had a colonoscopy at Hagen Drive in Penfield and I was extremely impressed. The nurses are highly skilled and very caring and comforting. Dr Prasad Penmetsa introduced himself and has a wonderful bedside manner. The information and photos of the procedure were easy to understand and useful. I thoroughly recommend RGA at Hagen Drive for any gastroenterology procedures!

Ken

Dr Muddasir is fantastic! He is the first GI doctor that listens to and wants to make sure he gets his patients feeling better!!! I’ve been through so many GI doctors and he is the best one I’ve ever had/have!!! Other staff are also very kind!!!

Alexis

I had Dr. Devgun and the mobile anesthesiologist team at the penfield office. They were absolutely amazing. My anesthesiologist was the most knowledgeable one I've ever met about my medications and going over what would work being sedated given my meds and history. All the nurses and the doctor were very kind and not rude or abrasive.

Monica

I had severe stomach pain. They didn't have a fast appointment with my doctor there, but finally offered a visit with Amy. She did a wonderful and thorough job on me. Even got me in for a rush upper GI. The office people are okay, but Amy and Dr. Chodas were/are fabulous. I go there for them. Thanks for a great service!

Robert

I had a wonderful experience with N.P. Sarah Pratt. She listened to my concerns, took the time to give detailed explanations and gave me the next steps for treatment. I had a negative experience at another gastro office and felt a huge weight off my shoulders after my appointment with N.P. Pratt. Thank you!

Hannah

I have been going to this practice on and off for the past 6 years. Dr. Chodos was the only GI doc in Rochester who helped me. I will be seeing him again this week for a procedure. I trust him completely. And the girls at the front have been very nice to me. I would highly recommend this practice.

Annette

Blogs

IBS

Signs to Visit Your Doctor for IBS

Cramping, bloating, and unpredictable trips to the bathroom are common signs of irritable bowel syndrome (IBS). IBS is a long-term condition that affects how the large intestine works.

November 9, 2026

Digestive

Common Digestive Symptoms You Shouldn’t Ignore

Everyone has an upset stomach now and then. A heavy meal, a stressful week, or a passing bug can all throw off your digestion. But some digestive symptoms are more

October 26, 2026

IBS

Are There Any Remedies to IBS Constipation?

If you live with irritable bowel syndrome and constipation, you know how frustrating it can be. Infrequent bowel movements, abdominal pain, and bloating can affect your comfort, your plans, and

October 19, 2026

Colonoscopy

How to Make Colonoscopy Prep Easier

For many people, the hardest part of a colonoscopy isn’t the procedure itself. It’s the bowel prep the day before. The good news is that colonoscopy prep has become easier

October 12, 2026

MENU