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Jermaine Clarke, DO, MBA, is a board certified physician at North Texas Gastroenterology Associates PLLC, a gastroenterology and hepatology practice in Sherman and Anna, Texas. 

Dr. Clarke graduated cum laude from the University of Toledo with a Bachelor of Science in biology with a minor in chemistry. He earned his doctorate from the Philadelphia College of Osteopathic Medicine. As a medical student, Dr. Clarke was inducted into the Sigma Sigma Phi National Osteopathic Honorary Fraternity and served as the vice president. Additionally, Dr. Clarke obtained a master’s degree in business administration with a concentration in healthcare administration while in medical school.

After completing medical school, Dr. Clarke completed his internship and residency in internal medicine and fellowship in gastroenterology at the University of Medicine and Dentistry of New Jersey School of Osteopathic Medicine. During his postgraduate training, Dr. Clarke served as the chief intern, as well as the chief resident in the internal medicine program.

Dr. Clarke is board certified in both gastroenterology and internal medicine. His special areas of interest include colorectal cancer, gastroesophageal reflux disease, chronic liver disease, and inflammatory bowel disease.

As a member of North Texas Gastroenterology Associates PLLC, Dr. Clarke’s goal is to provide high-quality care while educating and empowering the communities he serves. His patient-centered approach to care ensures that patients are partners in their digestive health care. He utilizes the latest evidence-based medicine, procedural techniques, and technology in order to deliver superior digestive services.

Jermaine Clarke, DO, MBA, is a board certified physician at North Texas Gastroenterology Associates PLLC, a gastroenterology and hepatology practice in Sherman and Anna, Texas. 

Dr. Clarke graduated cum laude from the University of Toledo with a Bachelor of Science in biology with a minor in chemistry. He earned his doctorate from the Philadelphia College of Osteopathic Medicine. As a medical student, Dr. Clarke was inducted into the Sigma Sigma Phi National Osteopathic Honorary Fraternity and served as the vice president. Additionally, Dr. Clarke obtained a master’s degree in business administration with a concentration in healthcare administration while in medical school.

After completing medical school, Dr. Clarke completed his internship and residency in internal medicine and fellowship in gastroenterology at the University of Medicine and Dentistry of New Jersey School of Osteopathic Medicine. During his postgraduate training, Dr. Clarke served as the chief intern, as well as the chief resident in the internal medicine program.

Dr. Clarke is board certified in both gastroenterology and internal medicine. His special areas of interest include colorectal cancer, gastroesophageal reflux disease, chronic liver disease, and inflammatory bowel disease.

As a member of North Texas Gastroenterology Associates PLLC, Dr. Clarke’s goal is to provide high-quality care while educating and empowering the communities he serves. His patient-centered approach to care ensures that patients are partners in their digestive health care. He utilizes the latest evidence-based medicine, procedural techniques, and technology in order to deliver superior digestive services.

Patient's have taught me that when they experience gastrointestinal issues it affects EVERYTHING in their life. Issues can range from being uncomfortable to severe difficulties related to digestion.   My passion is bringing healing to people . I work to find the cause of your symptoms and provide a treatment plan based on your personal needs. Taking care of people is just a natural part of my life and it ultimately contributes to my purpose!  I pride myself on providing results oriented  care for relief of your symptoms.  My "micro-office" allows the one-on-one focus  to partner with you on your health.  I provide a greater understanding of your body and bodily functions.  I help to decipher  confusing , complicated issues. I am happy to partner with you to improved health.

Arthur Walczyk, MD, FACG, is a board-certified gastroenterologist with the gastroenterology team at Northern Medical Group Gastroenterology Division, formerly known as The Digestive Disease Center of the Hudson Valley. He is dedicated to the treatment and prevention of diseases and disorders of the digestive tract to patients in Fishkill, Poughkeepsie, and Highland, New York. 

Dr. Walczyk is a known expert in performing colonoscopy, upper GI endoscopy (EGD), endoscopic ultrasound (EUS), endoscopic retrograde cholangiopancreatography (ERCP) and the removal of bile duct stones, and hemorrhoidal banding. He also specializes in treating biliary disease, ulcerative colitis, Crohn’s disease, and hepatitis C.

He earned his medical degree at St. George’s University School of Medicine in Grenada, West Indies. Dr. Walczyk then completed his residency training at LaGuardia Hospital (also known as North Shore University Hospital) in Forest Hills, New York. To further his training, Dr. Walczyk also pursued additional fellowships in gastroenterology at The Jamaica Hospital, an affiliate of Cornell University, in New York, and West Virginia University Hospital’s Robert Byrd Health Sciences Center in Morgantown, West Virginia.

Dr. Walczyk is highly regarded in the treatment of conditions, such as acid reflux disease (GERD), diverticulosis, lactose intolerance, Celiac disease, peptic ulcer disease, diarrhea, constipation, and colon cancer. He has admitting privileges at Mid-Hudson Regional Hospital and Vassar Brothers Medical Center in Poughkeepsie, New York, and Hudson Valley Endoscopy Center in Fishkill, New York. 

Dr. Walczyk is affiliated with the American Gastroenterology Association and Dutchess County Medical Society, and is a fellow of the American College of Gastroenterology.

Arthur Walczyk, MD, FACG, is a board-certified gastroenterologist with the gastroenterology team at Northern Medical Group Gastroenterology Division, formerly known as The Digestive Disease Center of the Hudson Valley. He is dedicated to the treatment and prevention of diseases and disorders of the digestive tract to patients in Fishkill, Poughkeepsie, and Highland, New York. 

Dr. Walczyk is a known expert in performing colonoscopy, upper GI endoscopy (EGD), endoscopic ultrasound (EUS), endoscopic retrograde cholangiopancreatography (ERCP) and the removal of bile duct stones, and hemorrhoidal banding. He also specializes in treating biliary disease, ulcerative colitis, Crohn’s disease, and hepatitis C.

He earned his medical degree at St. George’s University School of Medicine in Grenada, West Indies. Dr. Walczyk then completed his residency training at LaGuardia Hospital (also known as North Shore University Hospital) in Forest Hills, New York. To further his training, Dr. Walczyk also pursued additional fellowships in gastroenterology at The Jamaica Hospital, an affiliate of Cornell University, in New York, and West Virginia University Hospital’s Robert Byrd Health Sciences Center in Morgantown, West Virginia.

Dr. Walczyk is highly regarded in the treatment of conditions, such as acid reflux disease (GERD), diverticulosis, lactose intolerance, Celiac disease, peptic ulcer disease, diarrhea, constipation, and colon cancer. He has admitting privileges at Mid-Hudson Regional Hospital and Vassar Brothers Medical Center in Poughkeepsie, New York, and Hudson Valley Endoscopy Center in Fishkill, New York. 

Dr. Walczyk is affiliated with the American Gastroenterology Association and Dutchess County Medical Society, and is a fellow of the American College of Gastroenterology.

Joshua Lorbacher, PA-C, is a physician assistant at Wake Endoscopy, which has locations in Raleigh, Wake Forest, Cary, Clayton, and Wilson, North Carolina. 

He is native to The Triangle and graduated from NC State University in Raleigh, North Carolina, with a bachelor's degree in environmental science with a concentration in infectious diseases and public health. He returned to NC State and completed a master's of physiology before attending PA school at Methodist University in Fayetteville, North Carolina. He is NC Medical Board licensed and board-certified by the NCCPA.

Josh enjoys all aspects of GI care and commonly manages patients with IBS, GERD, IBD, liver, and pancreatic disorders, amongst many others. He welcomes the unique challenges that each patient brings and is happy to help. 

In his spare time outside of the office, he enjoys spending time with his wife and their cat, as well as hiking, camping, lifting weights, and reading.

Paul Burrows, MD, is a board-certified gastroenterologist at Northern Medical Group Gastroenterology Division, formerly known as The Digestive Disease Center of the Hudson Valley dedicated to the treatment and prevention of diseases and disorders of the digestive tract. At the practice’s locations in Fishkill, Poughkeepsie, and Highland, New York, Dr. Burrows offers his expertise in performing colonoscopies and upper GI endoscopy (EGD) procedures. 

Dr. Burrows received his medical degree at the Autonomous University of Guadalajara in Mexico and then completed his residency at Albany Medical College in Albany, New York. He then continued his training in gastroenterology at Faulkner Hospital, affiliated with Tufts University, in Boston, Massachusetts.

Dr. Burrows specializes in treating colon cancer, gastroesophageal reflux disease (GERD), irritable bowel syndrome, diverticulosis, food intolerances, Celiac disease, peptic ulcer disease, diarrhea, and constipation. He is fluent in Spanish as well.

He has admitting privileges at Mid-Hudson Regional Hospital, Vassar Brothers Medical Center, and Dutchess Ambulatory Surgical Center in Poughkeepsie, New York, and Hudson Valley Endoscopy Center in Fishkill, New York.

Paul Burrows, MD, is a board-certified gastroenterologist at Northern Medical Group Gastroenterology Division, formerly known as The Digestive Disease Center of the Hudson Valley dedicated to the treatment and prevention of diseases and disorders of the digestive tract. At the practice’s locations in Fishkill, Poughkeepsie, and Highland, New York, Dr. Burrows offers his expertise in performing colonoscopies and upper GI endoscopy (EGD) procedures. 

Dr. Burrows received his medical degree at the Autonomous University of Guadalajara in Mexico and then completed his residency at Albany Medical College in Albany, New York. He then continued his training in gastroenterology at Faulkner Hospital, affiliated with Tufts University, in Boston, Massachusetts.

Dr. Burrows specializes in treating colon cancer, gastroesophageal reflux disease (GERD), irritable bowel syndrome, diverticulosis, food intolerances, Celiac disease, peptic ulcer disease, diarrhea, and constipation. He is fluent in Spanish as well.

He has admitting privileges at Mid-Hudson Regional Hospital, Vassar Brothers Medical Center, and Dutchess Ambulatory Surgical Center in Poughkeepsie, New York, and Hudson Valley Endoscopy Center in Fishkill, New York.

Dr. Blair Lewis is a well-respected and experienced New York City gastroenterologist providing care for all sorts of gastrointestinal diseases and conditions at his private practice on Manhattan's Upper East Side. As a board-certified gastroenterologist with more than 72 scientific papers, 25 book chapters and three books to his credit, Dr. Lewis is skilled in a wide array of procedures and treatments aimed at diagnosing and treating GI issues, including endoscopy, colonoscopy, capsule endoscopy and colon cancer screening, as well as the care and management of diseases and conditions like gastroesophageal reflux disease (GERD), colonic polyps and inflammatory bowel disease (IBD). He is considered to be one of the world's leading experts in endoscopy and is widely considered to be the “father” of the capsule endoscopy technique, having served as the primary investigator of several early clinical trials.

Dr. Lewis received his M.D. From Albert Einstein College of Medicine, performing his residency in internal medicine at Montefiore Medical Center and a fellowship in internal medicine at Mount Sinai Hospital. In addition to his private practice, Dr. Lewis holds a faculty appointment at Mount Sinai Hospital and is a clinical professor of medicine at the Icahn School of Medicine at Mount Sinai. Named one of New York City's 100 best doctors, Dr. Lewis has been featured on CNN, NBC and CBS Nightly Newscasts, ABC’s 20/20, and NBC’s The Today Show.

Dr. Lewis also chaired the annual International Conference of Capsule Endoscopy, and he is past president of the New York Society for Gastrointestinal Endoscopy and the New York Academy of Gastroenterology. He teaches courses in capsule endoscopy nationally and internationally.

Committed to providing each patient with the information he or she needs to make educated, informed treatment decisions, Dr. Lewis offers one-on-one gastroenterology consultations to provide information about care, answer questions and address concerns. Each plan of treatment is carefully developed, taking multiple factors into account to ensure the best possible outcome based on every patient's unique medical needs and overall health.

Dr. Lewis welcomes new patients, and his practice accepts most major forms of medical insurance.

Robert Narvaez, MD, MBA, is an experienced gastroenterologist at Digestive & Liver Disease Center of San Antonio PLLC, a digestive health care center. As one of the top colon cancer specialists in San Antonio, Texas, Dr. Narvaez believes his training was an invaluable foundation for his expertise as a gastroenterologist. But above all, he believes in the importance of taking time to focus on each patient and who they are outside of their condition.

Medical excellence is the foundation of Digestive & Liver Disease Center of San Antonio PLLC. Dr. Narvaez provides patients with the most advanced diagnostic methods available for a wide range of conditions such as colorectal cancer, liver disease, gallbladder problems, heartburn, and more. As a digestive specialist, Dr. Narvaez consistently receives referrals from other doctors who respect his knowledge and expertise. In fact, doctors don’t just recommend their patients and family members to Dr. Narvaez, they go to him as well.

Dr. Narvaez earned his Bachelor of Science in biology from St. Mary’s University in San Antonio, Texas, graduating cum laude. He obtained his Master of Business Administration from Our Lady of the Lake University, also in San Antonio. He pursued his medical degree at Creighton University School of Medicine in Omaha, Nebraska, before completing his residency in internal medicine there. Afterward, he completed a fellowship in gastroenterology at Wilford Hall Ambulatory Surgical Center in San Antonio, Texas. 

Prior to Digestive & Liver Disease Center of San Antonio PLLC, Dr. Narvaez served as the former chief of the gastroenterology clinic at Robert L. Thompson Regional Hospital – Carswell Air Force Base in Fort Worth, Texas. He was also the president of the United Surgeons of San Antonio. Dr. Narvaez also established Home Technology Health Care, Inc., a corporation to deliver and manage parenteral and enteral nutrition for patients with digestive disorders.

Dr. Narvaez enjoys sharing his expertise with other respected leaders in his field and remains active in many professional organizations, including the American College of Gastroenterology, American Association of Physicians and Surgeons, American Society for Parenteral and Enteral Nutrition, American Telemedicine Association, Texas Medical Association, and Bexar County Medical Society.

Outside of work, Dr. Narvaez is passionate about giving back to the community. He is involved with many churches in San Antonio and contributes to charities for teenage mothers, homeless shelters, and various women’s organizations. In his free time, he enjoys weight lifting, fishing, and hunting.

Moushumi Sanghavi, MD, is board certified in both internal medicine and gastroenterology. At Gastroenterology on Gramercy Park in New York City, she treats all aspects of gastrointestinal and liver disease, but she has a special interest in irritable bowel syndrome and inflammatory bowel disease. She is also a partner of East Side Endoscopy, a nearby state-of-the-art ambulatory surgical center. Dr. Sanghavi is one of a few female gastroenterologists in New York City, and she has considerable experience treating diseases predominantly affecting women. She performs diagnostic and therapeutic upper endoscopy and colonoscopy procedures and noninvasively treats internal hemorrhoids with infrared coagulation and endoscopic banding. Dr. Sanghavi received her bachelor of arts degree from Yale University in New Haven, Connecticut. She attended medical school at New York University School of Medicine and completed her internal medicine residency at The Mount Sinai Hospital in New York City. She went on to complete her fellowship in gastroenterology training at Montefiore Medical Center in New York City. She is a member of the American College of Gastroenterology, the American Gastroenterological Association and the American Society of Gastrointestinal Endoscopy. She is affiliated with Mt. Sinai Beth Israel in New York City. Dr. Sanghavi speaks English and Spanish.

Dr. Reddy earned her medical degree from S.V. Medical College in Tirupati, India.  From there, Dr. Reddy completed both her Internal Medicine residency and her Gastroenterology/Hepatology fellowship at the State University of New York (SUNY) Stony Brook.

Dr. Reddy joined the practice in January 2008.  The majority of her practice is concentrated in the Raleigh and Cary areas.

Dr. Reddy is board certified in both Internal Medicine and Gastroenterology.  Dr. Reddy’s clinical interests include high risk colorectal cancer screening, genetic testing, Crohn’s disease/ulcerative colitis, IBS, celiac disease, dysphagia/achalasia, eosinophilic esophagitis (EOE), GERD, hepatitis, and other liver diseases.

She is involved in several ongoing clinical trials such as bowel prep studies, intractable GERD, and Crohn’s/colitis trials.

Dr. Reddy strives and finds joy in her medical career when she is able to connect with patients through care and compassion.

She lives in Cary with her husband and two sons.  Some of her personal interests are managing/watching kid activities, gardening, and traveling with her family.

Dr. Reddy earned her medical degree from S.V. Medical College in Tirupati, India.  From there, Dr. Reddy completed both her Internal Medicine residency and her Gastroenterology/Hepatology fellowship at the State University of New York (SUNY) Stony Brook.

Dr. Reddy joined the practice in January 2008.  The majority of her practice is concentrated in the Raleigh and Cary areas.

Dr. Reddy is board certified in both Internal Medicine and Gastroenterology.  Dr. Reddy’s clinical interests include high risk colorectal cancer screening, genetic testing, Crohn’s disease/ulcerative colitis, IBS, celiac disease, dysphagia/achalasia, eosinophilic esophagitis (EOE), GERD, hepatitis, and other liver diseases.

She is involved in several ongoing clinical trials such as bowel prep studies, intractable GERD, and Crohn’s/colitis trials.

Dr. Reddy strives and finds joy in her medical career when she is able to connect with patients through care and compassion.

She lives in Cary with her husband and two sons.  Some of her personal interests are managing/watching kid activities, gardening, and traveling with her family.

Dr Ahmad Farooq is a Gastroenterologist in Houston, Texas. He did his post-doctoral research fellowship at Yale University. He finished internal medicine training at SUNY-CHS Buffalo, where he served as chief resident. He did his gastroenterology and Hepatology fellowship at Duke University; followed by NIH T32 fellowship at Duke University. He has numerous publications published in leading journals such as Gastroenterology and American Journal of Physiology. Dr Farooq is board certified in internal medicine and board certified in gastroenterology and hepatology. Dr Farooq believes in providing personalized care tailored to individual personal needs. His practice philosophy centers on a good physician and patient relationship which is vital to improving long-term quality outcomes and care. Dr. Farooq treats patients 18 years of age and older. Dr Farooq serves as clinical assistant professor at University of Texas Medical Branch and adjunct assistant professor at Duke University

Meet Dr. Ascunce

Gil I. Ascunce, MD, is a board-certified gastroenterologist in New York City who treats patients from his main office in Manhattan on Madison Avenue, as well as in several non-profit community healthcare centers throughout the city. Dr. Ascunce has expertise in a wide range of gastrointestinal disorders and conditions including acid reflux, abdominal pain, constipation, and diarrhea. He also has special expertise in pancreatic diseases, removing large polyps, and Barrett's esophagus. He was born in Virginia to Cuban and Spanish immigrants, and he has native fluency in both Spanish and English.

Dr. Ascunce completed his undergraduate and graduate studies at Georgetown University in Washington, D.C. At Georgetown, he excelled in academics and was also a decorated varsity athlete for the Hoyas’ Big East championship soccer team. After completing his undergraduate studies, Dr. Ascunce went on to earn a Master of Science in Physiology and Biophysics and then also earned his medical degree at the Georgetown University School of Medicine, where he graduated with honors.

Dr. Ascunce then moved to New York for a residency in Internal Medicine at New York-Presbyterian Hospital-Weill Cornell Medical Center in Manhattan. After residency, he continued his medical education and completed a fellowship in Gastroenterology at the University of Miami/Jackson Memorial Hospital in South Florida. While training in gastroenterology, Dr. Ascunce developed a special interest in advanced endoscopic procedures. Finally, he returned to New York for an additional year of specialized training with an advanced therapeutic endoscopy fellowship at Beth Israel Medical Center in Manhattan. While he was once a full-time interventional endoscopist and in academic practice, his current practice emphasis is to treat and educate his patients and their community for all gastrointestinal diseases.

Dr. Ascunce is an Assistant Clinical Professor of Medicine at the Icahn School of Medicine at Mount Sinai, and he teaches medical residents and gastroenterologists-in-training at Mount Sinai Beth Israel Medical Center. Dr. Ascunce has engaged in various research projects including basic science research, clinical pharmacology, and clinical research. He has published papers in several major gastroenterology journals and he has presented his research at several national conferences.