Linden Oaks: 20 Hagen Drive, Suite 330, Rochester, NY 14625
Linden Oaks Ph: (585) 267-4040 Fax: (585) 267-4044
Canal Landing: 103 Canal Landing Blvd., Suite 12, Rochester, NY 14626
Canal Landing Ph: (585) 227-1080 Fax: (585) 723-7709

Telemedicine Instructions: If you have a smartphone or computer with a camera and microphone, you will be able to complete a telemedicine appointment. Patients will be contacted with a scheduled appointment time. Please click on the "live" link here to start your appointment with your provider. Proceed to your provider's link and log into your scheduled appointment time 15 minutes before your scheduled appointment.  You will then be put in the virtual waiting room. The Provider will click on your name when the encounter will begin. Please be patient as this is a new process. If the visit hasn't started in 30 minutes please call our office. 

Check here for further updates or call the office at (585) 227-1080 or (585) 267-4040  with any questions. Thank you for your patience during this challenging time.

Gastroenterologist Staff

All professionals at Rochester Gastroenterology Associates maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.

 Prasad Penmetsa M.D., M.R.C.P., F.A.C.G. 

 Rochester, NY Gastroenterologist 

  Rochester Gastroenterology Associates  

Dr. Penmetsa

Dr. Prasad Penmetsa graduated from  Rangaraya Medical College  , in India with his M.B.B.S. He trained in Internal Medicine and gastroenterology in England and obtained his MRCPI,  Membership of Royal College of Physicians of Ireland  .

Dr. Penmetsa completed his gastroenterology Fellowship at  University Hospitals of Cleveland  in Ohio. He served as Attending Gastroenterologist Faculty at the  University of Rochester Medical Center  for two years before joining RGA.

Dr. Penmetsa is board certified in gastroenterology and is well trained in GI procedures including ERCP (Endoscopic Retrograde Cholangiopancreatography). His clinical interests focus on esophageal disorders, pancreatobiliary diseases, VCE, viral hepatitis as well as inflammatory bowel disease.

Dr. Penmetsa volunteers as teaching faculty at Unity Health System's Medicine Residency Program as well as an attending Gastroenterologist at Rochester General Hospital.


 Surinder Devgun M.D. 

 Rochester, NY Gastroenterologist 

  Rochester Gastroenterology Associates  

Dr. Devgun

Dr. Devgun completed his undergraduate education in Electrical Engineering with honors from  Iowa State University  . He graduated from  SUNY Upstate Medical Center  (Alpha Omega Alpha) and completed General Internal Medicine training as well as advanced training in GI Motility and small bowel transplant at the  University of Pittsburgh Medical Center  . Dr. Devgun was in practice as a General Internist for two years prior to entering into a GI Fellowship.

Dr. Devgun completed his general Gastroenterology Fellowship with a focus on advanced endoscopy in ERCP (Endoscopic Retrograde Cholangiopancreatography) and EUS (Endoscopic Ultrasound), as well as inflammatory bowel Disease at the Albany Medical Center under the direction of Program Director, Dr. Richard McDermott.

Dr. Devgun's clinical interests focus on general gastroenterology, pancreatobiliary diseases as well as inflammatory bowel disease.
Dr. Devgun volunteers as teaching faculty at Unity Health System's Medicine Residency Program as well as an attending Gastroenterologist at Unity and Rochester General Hospital. Dr. Devgun established the EUS (Endoscopic Ultrasound) Program at Unity Hospital in 2006


 Ari Chodos M.D. 

 Rochester, NY Gastroenterologist 

  Rochester Gastroenterology Associates  

Dr. Chodos

Dr. Chodos completed his undergraduate training at the  University of Rochester  and continued on to attend medical school at  Trinity College in Dublin, Ireland  . He completed his Internal Medicine Residency and Fellowship in gastroenterology and hepatology at  UMDNJ-New Jersey Medical School in Newark, New Jersey  .

Dr. Chodos is a Board Certified Gastroenterologist who performs all basic diagnostic and therapeutic endoscopic procedures including colonoscopy, upper endoscopy, and flexible sigmoidoscopy. He also performs advanced endoscopic procedures including ERCP (Endoscopic Retrograde Cholangiopancreatography) and EUS (Endoscopic Ultrasound).


Marvin Singh, M.D.

Dr. MArvin

After graduating from Virginia Commonwealth University School of Medicine, Dr. Singh went on to do his Internal Medicine training at the University of Michigan Hospitals in Ann Arbor, after which he completed a Gastroenterology/Hepatology fellowship at Scripps Clinic Torrey Pines in San Diego.

Dr. Singh was a Medical Director at the University of California Irvine before joining Rochester Gastroenterology Associates and he has previously served as a faculty member at Johns Hopkins University and the University of California Los Angeles. He is a published author, invited speaker, and health advisor for Bottomless Closet in NYC, an organization that helps women in need.

Dr. Singh, his wife, and three children are excited to join the Rochester community.


Amy Hayes, M.S., F.N.P.-C.

Amy Hayes

Amy graduated from SUNY Brockport College with her B.S.N. She received her NP from St. John Fisher College and is certified by the American Association of Nurse Practitioners (AANP) and has been a member since 2008.

Amy joined Rochester Gastroenterology Associates, LLP in 2008. Prior to joining RGA she worked for 15 years as a nurse at Unity Health System with 13 of those years as an endoscopy nurse.

Amy has an extensive knowledge base in many disease states including inflammatory bowel disease, irritable bowel syndrome, gastro esophageal reflux disease, hepatitis and colon screenings.

Amy enjoys reading and attending sporting events with her four children.


Sarah Pratt, M.S., F.N.P.-C.

Sarah Pratt

Sarah graduated from Pennsylvania State University with her B.S.N. in 2007. She went on to receive her Family Nurse Practitioner degree from St. John Fisher College in 2013. Sarah then completed her Registered Nurse First Assist at the University of Rochester. She is a member of and certified through the American Association of Nurse Practitioners and is a member of the Nurse Practitioner Association of Greater Rochester.

Sarah joined Rochester Gastroenterology Associates, LLP in 2014. Prior to joining RGA, she worked as a Registered Nurse at Rochester General Hospital for six years and chaired the hospital's nurse council for two years. Once she completed her Nurse Practitioner degree, she worked for the department of surgery at Rochester General Hospital for one year before joining RGA.

In her spare time, Sarah enjoys spending time with her friends and family; especially at their cottage and on the boat.


Michelle Addison, M.S., F.N.P.-C.

Sarah Pratt

Michelle graduated from St. John Fisher College with her BSN in 2014. She went on to receive her Family Nurse Practitioner degree from St. John Fisher College and graduated with her master's degree in 2020. Michelle is certified by the American Association of Nurse Practitioners (AANP).

Prior to joining Rochester Gastroenterology Associates, LLP in October 2020, Michelle worked as a Registered Nurse at Rochester General Hospital for 6 years. Her nursing background consists of surgical nursing for colorectal, plastic, and general surgery. Michelle has a great interest in working with patients with Crohn's Disease.

In Michelle's spare time she enjoys spending time with her son, family, and friends. She enjoys travelling, hiking, and exploring new places.

Michelle is currently accepting new patients.

Contact Us

Office Hours

Monday:

9:00 am-4:00 pm

Tuesday:

9:00 am-4:00 pm

Wednesday:

9:00 am-4:00 pm

Thursday:

9:00 am-4:00 pm

Friday:

9:00 am-4:00 pm

Saturday:

Closed

Sunday:

Closed