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After earning his medical degree at Damascus University School of Medicine in Damascus, Syria, Dr. Alnounou completed his gastroenterology residency at the University of Illinois Hospital in Chicago.

He also completed fellowship training in clinical gastroenterology at Indiana University Medical Center in Indianapolis and advanced therapeutic endoscopy and endoscopic retrograde cholangiopancreatography (ERCP) at Fox Chase Cancer Center in Philadelphia, Pennsylvania.

Additionally, Dr. Alnounou finished a fellowship in transplant hepatology at Albert Einstein Medical Center in Philadelphia, Pennsylvania.

Digestive Health Clinic is fully equipped with advanced endoscopic ultrasound and upper endoscopy technologies. Dr. Alnounou also provides colonoscopy services for diagnostic evaluations and as part of his preventive colon cancer screenings. He performs many diagnostic procedures and surgical treatments on an outpatient basis.

The Digestive Health Clinic staff provides a welcoming environment with flexible scheduling for initial appointments and follow-up visits. Dr. Alnounou enjoys working with people from all walks of life and providing the resources they need to live well.

Dhruv Lowe, MD, is an experienced, board-certified physician specializing in Gastroenterology, Hepatology, and Internal Medicine. He sees patients at Gastro Center of Maryland's location in Riverdale and Gaithersburg, Maryland.

With a passion for providing exceptional patient care, Dr. Lowe treats a wide range of gastrointestinal conditions, such as acid-reflux disease, irritable bowel syndrome, ulcerative colitis, Crohn's disease, eosinophilic esophagitis, gastritis, celiac disease, liver disease, and other common gastrointestinal ailments utilizing the latest advancements in the field.

Dr. Lowe approaches each patient as a unique individual, tailoring treatment plans to their specific needs. He values a patient-centered approach and strives to establish strong doctor-patient relationships built on trust, empathy, and respect. His goal is to empower patients with the information and resources they need to make informed decisions about their health.

Dr. Lowe earned his medical degree from Maulana Aazad Medical College in New Delhi, India, a leading medical institute in the country. Following that, he completed his residency in Internal Medicine and a fellowship in Gastroenterology and Hepatology at SUNY Upstate Medical University. His extensive training has equipped him with a comprehensive understanding of the field and a commitment to providing evidence-based medical care.

Passionate about advancing medical knowledge, Dr. Lowe has presented at national gastroenterology conferences and has authored numerous review articles and clinical research papers in esteemed peer-reviewed publications.

During his free time, Dr. Lowe enjoys playing tennis, hiking and exploring new food places with his wife and kids.

If you're seeking compassionate, personalized care for your gastrointestinal health, Dr. Lowe is ready to provide exceptional medical expertise and support on your journey to wellness.

Dr Urooj Ahmed is a board-certified gastroenterologist and hepatologist with over twenty years of experience in diagnosing and treating a wide range of gastrointestinal and liver diseases. He is available to see patients now at Gastro Center of Maryland at their Columbia, Olney and Annapolis locations.

Dr Ahmed completed Internal Medicine Residency from St. Luke’s Roosevelt Hospital of Columbia University, New York and gastroenterology & hepatology fellowship from Medical College of Georgia, Augusta. He participated in a number of research studied and completed additional advance fellowship training.

Dr Ahmed is committed to providing personalized and compassionate care to his patients. He specializes in managing a wide range of gastrointestinal conditions including peptic ulcer disease, gastroesophageal reflux disease (GERD), Crohn’s disease, Ulcerative Colitis, pancreaticobiliary disorders, constipation, Celiac disease, GI bleeding, liver disease as well as colorectal cancer screening and more according to the latest medical advancements. He performs various endoscopy and colonoscopy procedures and tries to ensure that his patients receive an accurate diagnosis and effective treatment plan.

Dr Ahmed is a member of American College of Gastroenterology. He regularly attends national as well as international meetings to keep himself up to date with the latest advances in gastrointestinal and liver disease management to be available for his patients. His patient-first approach ensures that each individual receives a thoughtful, evidence -based personalized care to achieve optimal digestive health and better quality of life.

Dr. Monica Passi, MD is a double board-certified physician specializing in Gastroenterology/Hepatology and Internal Medicine. She is currently accepting new patients.

As an advanced endoscopist, Dr. Passi has particular expertise in pancreatobiliary disorders and the endoscopic diagnosis and treatment of gastrointestinal cancers.  Her clinical interests include early detection and management of a wide range of GI and liver conditions, such as acid reflux, inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), eosinophilic esophagitis, gastritis, and celiac disease, colon cancer screening and GI malignancies. Along with routine endoscopic procedures, Dr. Passi is skilled in performing the complex and technically demanding procedures of advanced endoscopy.

Dr. Passi is committed to delivering care that places the patient at the center of every decision and believes in shared decision making. She takes a holistic view of each person, developing personalized treatment strategies that reflect their individual needs and values. By fostering open dialogue and building trust, she works to establish meaningful relationships with her patients—ones rooted in compassion and mutual respect. Her mission is to provide the education and support patients need to make informed, confident choices about their health.

A native of the D.C. metropolitan area, Dr. Passi earned her medical degree from The George Washington University in Washington, D.C. She completed her residency in Internal Medicine at Northwell Health in Queens, NY. She then pursued a fellowship in Gastroenterology and Hepatology at the University of Maryland and the prestigious National Institutes of Health (NIH) in Bethesda, MD. To further specialize in advanced therapeutic endoscopy and pancreatobiliary disease, she completed a dedicated fellowship in advanced endoscopy at Northwell Health.

In addition to her clinical practice, Dr. Passi is passionate about contributing to the advancement of medical knowledge. She has presented her research at national and international conferences and authored numerous publications in respected, peer-reviewed journals.

Outside of medicine, Dr. Passi enjoys playing tennis, traveling, and spending time with her husband and children.

Dr. Passi provides expert, personalized care for a wide range of gastrointestinal conditions, combining clinical excellence with a compassionate approach. Whether you're managing a chronic condition or seeking answers to new symptoms, Dr. Passi is here to guide you every step on your path to better health.

Dr. Rushi Talati is a fellowship-trained gastroenterologist with a passion for delivering comprehensive, compassionate care to patients with digestive and liver disorders.

Dr. Talati is delighted to be practicing in his hometown. A native of Howard County, he ventured west for undergraduate studies at Stanford University. At Stanford, Dr. Talati did his undergraduate work in mechanical engineering, where he graduated with Honors distinction and developed courses around innovation in medicine. He received his M.D. and M.B.A. degrees from Northwestern University.

Dr. Talati completed his medical training at NYU, which has been consistently named one of the top 5 hospitals in the United States for gastroenterology by U.S. News and World Report. Here he completed his residency in Internal Medicine and was named Chief Resident where he helped teach and mentor junior physicians. After completing his residency and chief residency, he stayed at NYU for additional specialized training in gastroenterology and hepatology.

He is actively involved in gastroenterology professional societies and serves on several national committees including the American College of Gastroenterology’s (ACG) Technology and Innovation Committee, Legislative and Public Policy Council, and CPT Review Committee. He was named to the Forbes Magazine ‘30 Under 30’ list in Law and Policy.

By incorporating the latest techniques and research, Dr. Talati aims to provide the best medical care possible for his patients.

Farzin Rashti, MD, FACP, is Board Certified in Gastroenterology & Hepatology and Internal Medicine and is dedicated to offering his patients superior personalized care in a respectful and supportive environment. He sees his patients at Gastro Center of Maryland’s office in Riverdale, Maryland.

Dr. Rashti works toward developing a partnership with his patients and forms a unique connection, which allows for a more individualized and targeted treatment plan.

Dr. Rashti received his medical degree from the Howard University College of Medicine. He completed an internship year at the Los Angeles County University of Southern California Medical Center and completed his Internal Medicine residency and Gastroenterology and Hepatology Fellowship at Medstar Georgetown University Hospital/Washington Hospital Center in Washington, DC.

Dr. Rashti has authored numerous scholarly articles and book chapters and has presented his research at national gastroenterology medical conferences. He has helped design and establish protocols for Fecal Microbiota Transplantation for the treatment of recurrent Clostridium Difficile infections. He is a Fellow of the American College of Physicians and is a member of the American Medical Association, American Gastroenterological Association, and American College of Gastroenterology.

He treats patients with a wide variety of gastrointestinal disorders including Crohn’s Disease and Ulcerative Colitis (Inflammatory Bowel Disease), acid reflux and GERD, Irritable Bowel Syndrome, constipation, liver disease, biliopancreatic disorders, Celiac Disease, and Clostridium Difficile infections, in addition to many other ailments. Dr. Rashti specializes in performing advanced endoscopic procedures including Endoscopic Retrograde CholangioPancreatography (ERCP), Single Balloon Enteroscopy, Transoral Incisionless Fundoplication (TIF), Overstitch (endoscopic suturing), and the removal of advanced lesions.

Dr. Mamunes, MD, is one of the skilled gastroenterologists practicing at Gastro Center of Maryland, which has locations in Columbia, Annapolis, Olney, Riverdale, and Lutherville, Maryland. 

Dr. Mamunes grew up in Maryland, attending the University of Maryland, College Park and subsequently completing his medical degree at the University of Maryland School of Medicine. There he graduated summa cum laude and was elected to the Alpha Omega Alpha medical honor society. He then completed his residency in Internal Medicine and fellowship in Gastroenterology and Hepatology at Vanderbilt University Medical Center. During this time, he contributed to multiple research papers published in peer-reviewed medical journals, spanning topics from endoscopic practices to inflammatory bowel disease. He is currently a member of the American Gastroenterological Association (AGA) and American College of Gastroenterology (ACG).

Dr. Mamunes treats a wide range of gastrointestinal and liver disorders including inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), constipation, acid reflux, fatty liver disease, colon cancer screening, celiac disease, and eosinophilic esophagitis. He is skilled in endoscopy (EGD), colonoscopy, and video capsule endoscopy.

In his free time, Dr. Mamunes enjoys hiking, music, and spending time with his wife and dog

Dr. Thi Khuc, MD, is a board-certified physician specializing in Gastroenterology and Hepatology at Gastro Center of Maryland's location in Riverdale, Maryland. Trained with expertise in evidence-based medicine and clinical research by national and international authorities in the field, Dr. Khuc is committed to providing quality, personalized patient care. Dr. Khuc values her patients’ opinions in the medical decision-making process.

Dr. Khuc completed her medical degree at the University of Virginia, followed by an Internal Medicine residency at Loma Linda University in California. Thereafter, she completed her Gastroenterology and Hepatology fellowship under the Clinical Scholars Program at the University of Maryland and Mercy Medical Center in Baltimore, MD. She was elected as a 2023 American Gastroenterological Association (AGA) Innovations Fellow for the Center for GI Innovation and Technology and is currently a member of the AGA and American College of Gastroenterology (ACG).

Dr. Khuc is skilled in colonoscopy, endoscopy, video capsule endoscopy and esophageal manometry and breath testing interpretation. She treats a wide variety of gastrointestinal disorders including colorectal cancer screening, irritable bowel syndrome (IBS), acid reflux (GERD), peptic ulcer disease, microscopic colitis, eosinophilic esophagitis (EoE), constipation, infectious diarrheal disorders, and inflammatory bowel disease (IBD).

In her spare time, Dr. Khuc enjoys painting, traveling, and trying new ice cream flavors with her family and friends.

Josh Rosenbloom, DO, is a board-certified gastroenterologist and hepatologist at the Gastro Center of Maryland in Columbia, Lutherville, and Annapolis, Maryland. He is committed to providing his patients with the best possible personalized care in a calming and professional environment.

Dr. Rosenbloom received his medical degree from Des Moines University. After graduating, he continued his medical education at the St. John Providence health system through Michigan State University, completing a residency in internal medicine and a fellowship in gastroenterology. He also participated in published research studies on nutrition, weight loss, hepatitis C, and improving colonoscopy preparation.

Dr. Rosenbloom specializes in endoscopy , including colorectal cancer screenings, weight loss assistance, pain and symptom management, and nutrition. Given his interests in these areas , he has taken a special focus on performing both Orbera and Spatz bariatric balloon insertions

Approaching his 5th year at Gastro Center of Maryland, Dr. Rosenbloom is experienced in treating a wide array of gastrointestinal, liver, and pancreatic diseases. He most frequently treats GERD, irritable bowel syndrome (IBS), ulcerative colitis, Crohn’s disease, constipation, liver disease, celiac disease, among others.

Eduardo Castillo, MD, is a board-certified physician, with specialties in both gastroenterology and hepatology. Dr. Castillo is committed to treating his patients with an exemplary level of care in a family atmosphere and is proud to offer his skills at the Gastro Center of Maryland located in Columbia and Olney, Maryland.

Originally from Lima, Peru, Dr. Castillo received his medical degree from Lima’s prestigious Universidad Peruana Cayetano Heredia. He then traveled to Detroit, Michigan, for an internship, residency, and fellowship at the Henry Ford Hospital, where he served as chief medical resident of internal medicine and chief fellow for gastroenterology.

Dr. Castillo has conducted a wide range of research on digestive issues, as well as liver cancer, cirrhosis, microscopic colitis, and peptic ulcer disease. In addition to being widely published, Dr. Castillo has presented his findings at national medical conferences. He’s also a member of the American Medical Association, the American Gastroenterological Association, and the American College of Gastroenterology, and is board-certified in internal medicine, gastroenterology, and hepatology.

Dr. Castillo has a special interest in treating and preventing colon cancer, as well as treating hepatitis C, GERD, inflammatory bowel disease, and clostridium difficile infection.

Zafar Zamir, MD, FACG, AGAF is a Board-Certified Gastroenterologist who has been caring for the Hamilton community for decades. He earned his Medical Degree from Dow Medical College in Pakistan, and completed his Residency Training at Cook County Hospital in Chicago and Fellowship in Gastroenterology from the Medical College of Wisconsin.

Dr. Zamir has a particular interest in IBS and General Gastroenterology, including hemorrhoids and other ano-rectal disorders. Dr. Zamir has held a variety of leadership roles in the local community, including as a Clinical Assistant Professor at Rutgers RWJ Medical School and as President of the Medical Staff at RWJ University Hospital Hamilton.

Please note that Maniya Health Medical Group does not employ or in any way supervise Dr. Zafar Zamir, MD. He is employed by Hamilton Gastroenterology. Patients should contact Hamilton GI's offices directly for all questions concerning their GI treatment.

Dr. Christopher Chum, a board-certified Gastroenterologist, is deeply committed to enhancing the health and well-being of his community. Having earned his medical degree from the NYIT College of Osteopathic Medicine, Dr. Chum completed his residency at Coney Island Hospital, followed by a fellowship in General and Advanced Gastroenterology at the same institution. There, he served as Assistant Program Director and Director of Advanced Endoscopy for a prominent academic program dedicated to training the next generation of gastroenterologists and medical residents.

Renowned for his compassionate and patient-centered approach, Dr. Chum has consistently delivered cutting-edge care to a diverse patient population, including underserved communities.

While maintaining his academic affiliations at Coney Island Hospital, he has relocated to New Jersey with his family. Here, he extends his expertise to the Hamilton community, providing exceptional care and improving access to healthcare for all.

Dr. Chum specializes in advanced interventional endoscopy and offers comprehensive care across the spectrum of gastroenterology and hepatology. His clinical interests encompass biliary and pancreatic disorders, cancer prevention, gastrointestinal oncology, and the burgeoning fields of fatty liver disease, obesity, with non-surgical medical and endoscopic weight loss options.

Please note that Maniya Health Medical Group does not employ or in any way supervise Dr. Christopher Chum, DO. He is employed by Hamilton Gastroenterology. Patients should contact Hamilton GI's offices directly for all questions concerning their GI treatment.

Noel R. Fajardo, MD, is a skilled gastroenterologist practicing at Las Vegas Gastroenterology, which has three locations throughout Las Vegas and Henderson, Nevada. His mission is to provide compassionate and comprehensive care to individuals living throughout the Las Vegas Valley area.

Dr. Fajardo is a graduate of the University of the Philippines College of Medicine. He finished his residency and chief residency at Mount Sinai School of Medicine in New York City. After his residency, Dr. Fajardo specialized in gastroenterology and hepatology at the Mayo Clinic College of Medicine in Rochester, Minnesota, where he also earned an advanced fellowship degree in gastrointestinal motility. He is a former clinical instructor at the Mayo Clinic College of Medicine and is board certified in internal medicine and gastroenterology by the American Board of Internal Medicine (ABIM). 

Dr. Fajardo’s research interests have included disorders of the bowel associated with spinal cord injury and experimental treatments for other neuropathic gastrointestinal disorders. The results of his research have been presented at national and international meetings.

Dr. Fajardo has been a strong advocate for diagnosing and treating Hepatitis B in the Asian community nationwide through awareness campaigns and national and international media. He has been a promoter and organizer of large regional screenings and benefit events. Dr. Fajardo has also been an advocate for colon cancer screening, promoting the prevention, as well as the early detection of colon cancer within the Las Vegas Valley community.

To better serve more diverse patient populations, Dr. Fajardo is also fluent in Tagalog and Spanish.

Filippo Cremonini, MD, PhD, MSc is a graduate of the Catholic University of Rome, Italy, where he also completed residency in Internal Medicine. He finished residency at Mayo Clinic College of Medicine in Rochester, Minnesota, where he obtained a Masters’ degree in Clinical Research, and earned a PhD in Gastrointestinal Physiology. After residency, Dr. Cremonini specialized in Gastroenterology and Hepatology at BIDMC-Harvard Medical School in Boston, Massachusetts. He has held titles of Assistant Professor of Medicine at BIDMC-Harvard Medical School, Assistant Professor of Medicine at the Mayo Clinic College of Medicine, in Rochester, Minnesota, Visiting Professor at U.C.L.A., and holds a title of full Professor of Gastroenterology with the Italian Ministry of University (MIUR). Dr. Cremonini is board certified in internal medicine and gastroenterology by the American Board of Internal Medicine (ABIM).

Dr. Cremonini has authored more than 150 publications in the field of gastroenterology. He is a regular invited speaker and lecturer at the main meetings in the fields of Gastroenterology and Internal Medicine. He has received numerous awards for his research and activities in Europe and in the US. Dr. Cremonini is also fluent in Italian and Spanish.

Stephen Stephenson, MD, is a board-certified physician at Carolina Digestive Health Associates, PA, a private medical practice with 15 locations in the greater Charlotte area, including: Belmont, Concord, Davidson, Denver, Matthews, Monroe, Huntersville, University, and Pineville, North Carolina. Dr. Stephenson sees patients at the Carolina Digestive Endoscopy Center in Charlotte, Carolina Endoscopy Center in Monroe, and Monroe/Union County office.

Dr. Stephenson earned his medical degree from St. George's University School of Medicine in Grenada, West Indies. He completed his residency in internal medicine at the New York Methodist Hospital in Brooklyn, New York, and his fellowship in gastroenterology at the Brooklyn Hospital Center in Brooklyn, New York.

At Carolina Digestive Health Associates, PA, Dr. Stephenson specializes in gastroenterology, hepatology, and pancreatic and biliary diseases with an emphasis on gastrointestinal nutrition and irritable bowel syndrome.

When he’s not in the office, Dr. Stephenson loves spending time with his family. He speaks French, Spanish, Greek, and English. His favorite hobbies include gourmet cooking, composing music, playing the guitar, and traveling.

Eric Thompson, MD, is a board-certified physician at Carolina Digestive Health Associates, PA, a private medical practice with 15 locations in the greater Charlotte area, including: Belmont, Concord, Davidson, Denver, Matthews, Monroe, Huntersville, University, and Pineville, North Carolina. Dr. Thompson sees patients at the Charlotte/Uptown office, Carolina Digestive Endoscopy Center in Charlotte, Carolina Endoscopy Center in Pineville, and Matthews office.

Dr. Thompson earned his medical degree from the University of Alabama School of Medicine in Birmingham. After a residency in internal medicine at the University of North Carolina School of Medicine in Chapel Hill, he completed his fellowship in adult gastroenterology and hepatology at the Medical College of Virginia in Richmond.

Dr. Thompson specializes in general gastroenterology and hepatology. He also provides compassionate care for patients with cirrhosis, viral hepatitis, and other liver diseases. Along with his work at Carolina Digestive Health Associates, PA, Dr. Thompson is on the liver transplant team at Carolinas Medical Center in Charlotte.

In his spare time, Dr. Thompson enjoys playing racquetball and traveling.

Meredith Walker Oliver, PA-C, is a certified physician assistant at Carolina Digestive Health Associates, with 15 locations in the cities of Charlotte, Belmont, Concord, Davidson, Denver, Matthews, Monroe, Huntersville, and Pineville, North Carolina. 

Meredith graduated from Converse College in Spartanburg, South Carolina, with a Bachelor of Science in Biology and a minor in Chemistry. She then continued her studies at Wingate University near Charlotte, North Carolina, earning her master’s in physician assistant studies. 

Meredith completed a gastroenterology rotation with Carolina Digestive Health Associates during physician assistant school. Meredith discovered her joy in helping patients with their various gastroenterological conditions through this rotation and eventually joined the CDHA team full-time. She is an invaluable member of the team.

Meredith is licensed by the North Carolina Medical Board and certified in basic life support and advanced cardiac life support. When not treating patients, Meredith enjoys riding her horses and spending time with her family and friends. 

Garrett Greenan, MD, is a board-certified gastroenterologist at Carolina Digestive Health Associates, PA, with 15 locations in the greater Charlotte area, including: Belmont Uptown, Concord, Davidson, Denver, Matthews, Monroe, Huntersville, University, and Pineville, North Carolina. Dr. Greenan sees adult patients at Davidson/Lake Norman office, the University office, Carolina Digestive Endoscopy Center in Charlotte, Carolina Endoscopy Center in Huntersville, and Carolina Endoscopy Center in University.

Dr. Greenan is from Maryland, with an undergraduate degree from the University of Pennsylvania. He received his medical degree from the University of Maryland School of Medicine. Dr. Greenan completed his internship and residency in internal medicine at the University of Texas Southwestern Medical Center, in Dallas, Texas. He then completed his fellowship in gastroenterology at Washington University in St. Louis School of Medicine/Barnes Jewish Hospital, in St. Louis, Missouri.

Dr. Greenan's practice is focused on treating patients with a wide range of conditions, including irritable bowel syndrome, inflammatory bowel disease, gastroesophageal reflux disease, celiac disease, and chronic liver diseases. His endoscopic practice emphasizes the prevention of colon cancer.  Dr. Greenan also performs both InterStim (for fecal incontinence) and in-office hemorrhoid banding.

Dr. Greenan is a member of the American College of Gastroenterology, the American Society of Gastrointestinal Endoscopy, the American Gastroenterological Association, and the American Association for the Study of Liver Diseases.

In his free time, Dr. Greenan enjoys exploring Charlotte with his wife and spending time with his family, friends, and pets. He is an avid runner, and he likes playing tennis and golf as well.