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Omid A. Shaye, MD, brings a wealth of experience and a vast body of knowledge to Gastroenterology Associates of Beverly Hills. He and his Co-Director Dr. Enayati have quickly become the “go-to” doctors for all GI disorders and related treatments in Beverly Hills, California. A strong patient advocate and supporter of educational outreach, Dr. Shaye encourages all of his patients to learn as much as they can about their specific health condition so that he and the patient can work together as a team.

Dr. Shaye has done extensive research on GI disorders and liver diseases, is the author of numerous journal articles and abstracts and has presented on a variety of topics both nationally and internationally. He is a member of the American Association for the Study of Liver Diseases; American Gastroenterology Association; American Society of Gastrointestinal Endoscopy; California Medical Association; American College of Physicians-American Society of Internal Medicine; and American Medical Association. He has certifications from the American Board of Internal Medicine and the American Board of Gastroenterology.

Dr. Shaye received a Bachelor of Science in Neuroscience from the University of California, Los Angeles with a minor in Education specializing in Community Leadership, and he received his Doctor of Medicine from the University of California, San Diego. Dr. Shaye was named “Gastroenterology Fellow of the Year” at the University of California, Los Angeles, awarded by the David Geffen School of Medicine’s Division of Digestive Diseases. 

He was also the recipient of multiple Leo G. Rigler M.D. Awards for outstanding academic achievement at Cedars-Sinai Medical Center. He completed his internship and residency in internal medicine at Cedars Sinai Medical Center. He also did a Gastroenterology Fellowship in the Department of Digestive Diseases at UCLA’s David Geffen School of Medicine. A resident of Los Angeles for most of his life, Dr. Shaye is married to Kelly and they have four young daughters.

Daniel M Eshaghian, DO, is an experienced doctor of osteopathic medicine offering expert care at Suhail Salem, MD, a gastroenterology and interventional endoscopy practice based in Northridge, California.

A native of San Fernando Valley, Dr. Eshaghian attended University of California, Los Angeles (UCLA) for his undergraduate studies, where he earned a Bachelor of Arts degree in Political Science. He earned his medical degree from the Western University of Health Sciences, College of Osteopathic Medicine of the Pacific (COMP) in Pomona, California. 

Following graduation, Dr. Eshaghian completed his internship and residency training in Internal Medicine at Oklahoma State University Medical Center (OSU Medicine) in Tulsa. After residency training, he spent two years practicing inpatient medicine as a Gastroenterology fellow at OSU Medicine, serving as chief fellow in his final year of training.

Dr. Eshaghian practices general gastroenterology and hepatology, particularly in colorectal cancer screening, reflux disease, nonalcoholic fatty liver disease, and inflammatory bowel disease (IBD).

His desire to serve his hometown brought him back to Southern California after completing medical training.

In his spare time, Dr. Eshaghian enjoys watching sports, cycling, European history, traveling, and spending time with his family and friends. He is also fluent in Farsi.

Daniel M Eshaghian, DO, is an experienced doctor of osteopathic medicine offering expert care at Suhail Salem, MD, a gastroenterology and interventional endoscopy practice based in Northridge, California.

A native of San Fernando Valley, Dr. Eshaghian attended University of California, Los Angeles (UCLA) for his undergraduate studies, where he earned a Bachelor of Arts degree in Political Science. He earned his medical degree from the Western University of Health Sciences, College of Osteopathic Medicine of the Pacific (COMP) in Pomona, California. 

Following graduation, Dr. Eshaghian completed his internship and residency training in Internal Medicine at Oklahoma State University Medical Center (OSU Medicine) in Tulsa. After residency training, he spent two years practicing inpatient medicine as a Gastroenterology fellow at OSU Medicine, serving as chief fellow in his final year of training.

Dr. Eshaghian practices general gastroenterology and hepatology, particularly in colorectal cancer screening, reflux disease, nonalcoholic fatty liver disease, and inflammatory bowel disease (IBD).

His desire to serve his hometown brought him back to Southern California after completing medical training.

In his spare time, Dr. Eshaghian enjoys watching sports, cycling, European history, traveling, and spending time with his family and friends. He is also fluent in Farsi.

Sam Weissman, MD, is a skilled and experienced gastroenterologist located in Brighton Beach and serving the greater Brooklyn, New York, community. Dr. Weissman obtained his medical degree from the Albert Einstein College of Medicine of Yeshiva University. He then completed his residency in internal medicine and fellowship in gastroenterology at Long Island Jewish Medical Center.

Dr. Weissman is board certified by the American Board of Internal Medicine gastroenterology. Dr. Weissman gives each patient his focused attention, and he prides himself on delivering the best treatment available, whether it be for common complaints such as diarrhea and constipation or performing diagnostic procedures. Patients trust his expertise because he consistently provides high-quality care that leads to positive and lasting health outcomes.

After receiving his medical degree from the Albert Einstein College of Medicine, Dr. Weissman worked at the Long Island Jewish Medical Center in New York. During that time, he continued his training in therapeutic endoscopy, gaining expertise in endoscopic tests, esophageal stent placement, and small bowel enteroscopy. He has been a Chief of Gastroenterology at New York Methodist Hospital for almost 20 years, as well as a Chief of Department at Interface Medical Center.

Alan J Naim is a board-certified gastroenterology and hepatology specialist at Suhail Salem, MD, an interventional endoscopy practice. Dr. Naim provides high-quality, individualized care to the residents of Northridge, California, and surrounding areas.

Dr. Naim completed his gastroenterology fellowship and training at the University of Arizona and Banner Medical Center in Phoenix, Arizona. Before his fellowship, Dr. Naim earned his medical doctorate at the University of Toledo College of Medicine in Ohio. He completed his internship and residency at USC and LAC Medical Center in Los Angeles, California.

In clinical practice, Dr. Naim encompasses all aspects of gastroenterology, focusing on detecting colon polyps and removing advanced polyps using endoscopic mucosal resection (EMR). Furthermore, he treats bleeding disorders, irritable bowel syndrome (IBS), SIBO, and IBD. He also manages complications of GERD, including Barret’s esophagus. 

Dr. Naim has contributed to research and has been publicized in the fields of rectal cancer and autoimmune diseases, among others. He has been distinguished for his high adenoma detection rate in colonoscopy screening and takes pride in his thorough and systematic approach to endoscopy and colonoscopy.

He always takes a holistic approach that incorporates a decreased reliance on medications and emphasizes healthy lifestyle choices and a clear understanding of the disease process.

Dr. Naim is a Los Angeles native and has worked in the San Fernando Valley for over three years. He has affiliations with major hospitals, including Tarzana Providence, Cedars Sinai Medical Center, Northridge Dignity Health Medical Center, and more.

In his spare time, Dr. Naim enjoys cooking, gardening, playing sports, and spending time with his family. He is fluent in English and Farsi and is conversational in Spanish.

Alan J Naim is a board-certified gastroenterology and hepatology specialist at Suhail Salem, MD, an interventional endoscopy practice. Dr. Naim provides high-quality, individualized care to the residents of Northridge, California, and surrounding areas.

Dr. Naim completed his gastroenterology fellowship and training at the University of Arizona and Banner Medical Center in Phoenix, Arizona. Before his fellowship, Dr. Naim earned his medical doctorate at the University of Toledo College of Medicine in Ohio. He completed his internship and residency at USC and LAC Medical Center in Los Angeles, California.

In clinical practice, Dr. Naim encompasses all aspects of gastroenterology, focusing on detecting colon polyps and removing advanced polyps using endoscopic mucosal resection (EMR). Furthermore, he treats bleeding disorders, irritable bowel syndrome (IBS), SIBO, and IBD. He also manages complications of GERD, including Barret’s esophagus. 

Dr. Naim has contributed to research and has been publicized in the fields of rectal cancer and autoimmune diseases, among others. He has been distinguished for his high adenoma detection rate in colonoscopy screening and takes pride in his thorough and systematic approach to endoscopy and colonoscopy.

He always takes a holistic approach that incorporates a decreased reliance on medications and emphasizes healthy lifestyle choices and a clear understanding of the disease process.

Dr. Naim is a Los Angeles native and has worked in the San Fernando Valley for over three years. He has affiliations with major hospitals, including Tarzana Providence, Cedars Sinai Medical Center, Northridge Dignity Health Medical Center, and more.

In his spare time, Dr. Naim enjoys cooking, gardening, playing sports, and spending time with his family. He is fluent in English and Farsi and is conversational in Spanish.

Kostas Sideridis, DO, is an osteopathic doctor at Long Island Gastro in Syosset, Long Island, New York. 

Dr. Sideridis earned his degree at the New York Institute of Technology College of Osteopathic Medicine. He then completed his internship at the Wyckoff Heights Medical Center in Brooklyn, New York, and completed his residency at New York University Winthrop Hospital. Dr. Sideridis then went on to complete his fellowship in gastroenterology at the Long Island Jewish Medical Center. After completing his fellowship, Dr. Sideridis helped co-found Long Island Gastro.  

Dr. Sideridis takes a holistic approach to patient health. He takes the time to listen to patient concerns and discuss the variety of treatment options available. Dr. Sideridis is dedicated to being a partner to patients seeking to improve their overall health. Patients with hepatopancreatobiliary diseases and irritable bowel syndrome have found the relief they need with Dr. Sideridis. He is also a proponent of therapeutic endoscopy to treat a variety of gastrointestinal issues.

For a doctor that cares about patient satisfaction, and offers the best possible treatment, book an appointment online or by phone with Dr. Sideridis.

About Us

John Rivas, MD, is a triple board-certified gastroenterologist and founder of Rivas Digestive Center in Hollywood, Florida. Dr. Rivas and the team are committed to offering comprehensive, patient-centered gastrointestinal care with the highest level of professionalism, quality, and care.

Dr. Rivas graduated with his Bachelor of Arts in biology from the University of Miami in Coral Gables, Florida. He completed his medical degree at Ross University School of Medicine in Dominica, West Indies, graduating with the highest honors. Dr. Rivas returned to Florida to complete his internal medicine residency at the Florida campus of the Cleveland Clinic and was given the Chief Resident Award. 

To further his training, Dr. Rivas completed a fellowship in gastroenterology at Cleveland Clinic Florida, and a subsequent fellowship in advanced transplant hepatology at the Cleveland Clinic in Ohio. After his training, Dr. Rivas returned to Cleveland Clinic Florida, and served as a staff gastroenterologist and transplant hepatologist in the abdominal transplantation department in 2014. 

Rivas Digestive Center is a culmination of Dr. Rivas’ vast experience in gastroenterology and endoscopy. He offers his specialized training and expertise in various areas of gastrointestinal conditions, including celiac disease, GERD, hepatitis, irritable bowel syndrome, and more. Rivas Digestive Center also offers colon cancer screenings and colonoscopies, and the comfort of a team that’s ready to personalize treatment to each patient and their individual needs. As an active researcher and the primary investigator for several large, multi-center research studies, Dr. Rivas is committed to offering his patients the most up-to-date treatment solutions. 

Rivas Digestive Center is honored to be your trusted health partner and the compassionate team is here to serve your every need. Call the office to make an appointment today or book online. 

Jaydeep Kadam, MD, is a board-certified gastroenterologist at Long Island Gastro in Syosset, Long Island, New York. Dr. Kadam majored in public health at John Hopkins University in Baltimore, Maryland. He then went on to earn his medical degree at Ross University School of Medicine. Dr. Kadam later completed his fellowship in gastroenterology at the Long Island Jewish Medical Center in New York.

Dr. Kadam’s vast experience and knowledge of the digestive system have been well documented in countless national publications. He has also been a presenter on gastrointestinal and liver topics on a national level. Currently, Dr. Kadam is a consultant for various pharmaceutical companies as they conduct gastroenterological research. He also serves as the President-elect of the Medical Staff Society at the North Shore University Hospital in Manhasset, New York.  

As a co-founder of Long Island Gastro, Dr. Kadam is involved in assisting patients dealing with various digestive issues. Men and women of various ages have received compassionate and effective treatment for conditions like liver disease, reflux disorders, and heartburn. Dr. Kadam helps many patients prevent colon cancer through regular checkups. His compassionate and understanding approach to patient health ensures that patients receive the care and attention they need from an expert gastroenterologist.

To find relief from digestive issues, book an appointment with Dr. Kadam either online or by calling the office of Long Island Gastro today.

Nicholas Martinez, MD, is a board-certified gastroenterologist providing complete care for patients at Gastroenterology Clinic of San Antonio. Dr. Martinez found his inspiration for pursuing a career in medicine after observing the health problems suffered by close family members when he was growing up. His experiences still inspire him as a doctor, and his patient, comforting manner reassures people who come to him for care, making them feel like family.

A native of San Antonio, Dr. Martinez speaks fluent Spanish as well as English. He earned his bachelor’s degree from Baylor University in Waco, Texas, before studying medicine at the University of Texas Health Science Center at San Antonio. He then stayed at UT Health San Antonio for his internal medicine residency and gastroenterology fellowship. During his training, Dr. Martinez received a humanitarian award for his outstanding patient care and exemplary bedside manner.

Dr. Martinez has a particular interest in inflammatory bowel disease (IBD), gastroesophageal reflux disease (GERD), and colon cancer prevention. He’s published many scholarly articles in leading medical journals, and regularly presents his research findings at national academic conferences. Dr. Martinez holds certification from the American Board of Internal Medicine, and has a decade of experience helping patients with a range of gastrointestinal disorders.

Albert M. Harary, MD, is a board-certified gastroenterologist and internal medicine physician, practicing on Manhattan’s Upper East Side since 1984. Dr. Harary is located in the Park 55 Building and offers a wide range of advanced diagnostic and treatment services to residents of New York City and Tri-state area.

Dr. Harary is listed as a Top Doctor by the Castle Connolly Guide. He is also a part of the medical staff at both Lenox Hill Hospital and New York University Langone Medical Center, and is a fellow of the American College of Physicians. In addition to his private practice work, Dr. Harary is a clinical assistant professor at New York University School of Medicine and serves as the director of the GI motility unit at Lenox Hill Hospital.

Focused on staying up to date with the latest endoscopic techniques for treating a variety of conditions, Dr. Harary has a special interest in esophageal and gastrointestinal motility disorders, gastroesophageal reflux disease (GERD), irritable bowel syndrome, inflammatory bowel disease, and liver disease. He is a published author, with many of his research papers on gastrointestinal and liver disease and endoscopic techniques appearing in medical journals and book chapters.

A magna cum laude graduate of Harvard College, Dr. Harary earned his medical degree from Columbia University College of Physicians and Surgeons. He completed both his internship and residency in internal medicine and his fellowship training in gastroenterology at the University of Miami Affiliated Hospitals. After graduation, Dr. Harary relocated to the East Side of Manhattan in New York City, where he has been serving patients ever since.

When not assisting his patients, Dr. Harary spends time hiking and enjoying Manhattan with his wife and three children. 

View Dr. Harary's Publications

Samuel Cho, MD, is a board-certified gastroenterologist at his New York City practice in Flushing, Queens. With over 15 years of practice experience, Dr. Cho is a leading physician who specializes in preventing and treating digestive diseases as well as offering comprehensive patient care.

Dr. Cho graduated with honors from Williams College in Williamstown, Massachusetts, and received his medical degree from The New York University School of Medicine. He then finished both an internal medicine residency and a gastroenterology fellowship training at NYU Langone Medical Center.  He and his experienced team identify and act on disease risk factors to keep patients healthy. Dr. Cho offers the safest, most effective, personalized treatment plans.

He and his staff perform a wide array of endoscopy and colonoscopy procedures in his Flushing office using advanced techniques in a comfortable, convenient setting. He’s committed to making a meaningful, positive difference in patient health, longevity, and overall wellbeing.

Patients seeking relief or treatment for colorectal cancer, Crohn's disease, gastroesophageal reflux disease (GERD), indigestion, irritable bowel syndrome (IBS), ulcers, stomach flu, and more can turn to Dr. Cho and his gastroenterology team for the quality care they deserve.

He maintains his advanced credentials and stays up-to-date with the latest advances in gastrointestinal medicine. Dr. Cho is board-certified in internal medicine and gastroenterology and is considered a top physician in New York City. He attracts patients internationally, particularly VIP patients from Korea.

Dr. Cho and his team look forward to welcoming new patients to the practice. To learn more about the medical services available at Samuel Cho, MD, PC, schedule an appointment by phone or online today.

Lourdes González Bahamonde, DO, is a fellowship-trained gastroenterologist, board certified in internal medicine and medical ethics, providing comprehensive medical care at Center For Digestive Healing in the San Gabriel Valley, and Los Angeles California. She earned a bachelor's degree in psychobiology at UCLA, and a master's in bio-physiology at CSULA before earning her medical degree at New York College of Osteopathic Medicine, NYIT on Long Island. She completed her ACGME training in internal medicine, gastroenterology, hepatology, and nutrition at North Shore University Hospital and Long Island Jewish Medical Center in New York in 2013.

The Center For Digestive Healing was established as an sCorp in 2018. It is fully equipped with the latest diagnostic technologies. She offers comprehensive care through a telemedicine platform, assisting patients from wherever they are. While Dr. Bahamonde specializes in digestive disorders, her practice has evolved toward integrative, preventive, patient-centered care that combines learned principles in internal medicine and GI with osteopathic manipulative medicine in practice.

Over the four years since relocating from NY, she has performed over 7,500 gastric and colorectal cancer screening endoscopies with polypectomies and mucosal resections, as well as advanced disease screenings for chronic liver disease. Dr. Bahamonde emphasizes peer-reviewed understanding of the interrelationship of body, structure, and function, allowing her special insight into treating gut-brain disorders. She has dedicated her life to serving diverse communities through education and cultural competence, recognizing the importance of open communication in shared-decision making.

Dr. Bahamonde continues to inspire future health care leaders as volunteer faculty in clinical medicine, medical ethics, and clinical research. She is dedicated to translational science efforts for youth in STEM programs and students in pre-health professions.

Lourdes González Bahamonde, DO, is a fellowship-trained gastroenterologist, board certified in internal medicine and medical ethics, providing comprehensive medical care at Center For Digestive Healing in the San Gabriel Valley, and Los Angeles California. She earned a bachelor's degree in psychobiology at UCLA, and a master's in bio-physiology at CSULA before earning her medical degree at New York College of Osteopathic Medicine, NYIT on Long Island. She completed her ACGME training in internal medicine, gastroenterology, hepatology, and nutrition at North Shore University Hospital and Long Island Jewish Medical Center in New York in 2013.

The Center For Digestive Healing was established as an sCorp in 2018. It is fully equipped with the latest diagnostic technologies. She offers comprehensive care through a telemedicine platform, assisting patients from wherever they are. While Dr. Bahamonde specializes in digestive disorders, her practice has evolved toward integrative, preventive, patient-centered care that combines learned principles in internal medicine and GI with osteopathic manipulative medicine in practice.

Over the four years since relocating from NY, she has performed over 7,500 gastric and colorectal cancer screening endoscopies with polypectomies and mucosal resections, as well as advanced disease screenings for chronic liver disease. Dr. Bahamonde emphasizes peer-reviewed understanding of the interrelationship of body, structure, and function, allowing her special insight into treating gut-brain disorders. She has dedicated her life to serving diverse communities through education and cultural competence, recognizing the importance of open communication in shared-decision making.

Dr. Bahamonde continues to inspire future health care leaders as volunteer faculty in clinical medicine, medical ethics, and clinical research. She is dedicated to translational science efforts for youth in STEM programs and students in pre-health professions.

About Anne Thai, MD

Anne Thai, MD, is a board-certified gastroenterologist who proudly serves the San Francisco area community at her practice in Burlingame, California.

Dr. Thai graduated with a bachelor's degree in biological sciences from the University of California, Davis. She went on to receive her medical degree from Saint Louis University School of Medicine, located in St. Louis, Missouri. After medical school, Dr. Thai returned to her home state and completed a residency in internal medicine and a fellowship in gastroenterology at the UC Davis Medical Center in Sacramento, California.

Dr. Thai is skilled in treating the entire digestive tract from the esophagus to the rectum, including the pancreas, gallbladder, biliary tract, and liver. She prides herself on taking the time to listen to every patient and understand their health history. In doing so, she’s able to address their needs in a timely manner and minimize the potential for expensive and unnecessary tests.

In her free time, Dr. Thai enjoys spending time with her family and friends. She travels often, loves to eat new foods, and is a big believer in physical fitness and spiritual wellness. Dr. Thai is affiliated with Mills-Peninsula Medical Center in Burlingame, California.