Find a Top Gastroenterologist Near Me in Rancho Cucamonga, CA – Book an Appointment Instantly

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.

Shahrooz Bemanian, MD, FACP, MA, MS, is a board-certified gastroenterologist at Digestive Disease Consultants of Orange County, with locations in Irvine, Huntington Beach, Tustin, and Foothill Ranch, California.

Ever since Dr. Bemanian was a young child, he was determined to become a doctor. Helping people reach their health goals appealed to him. It was, however, after watching a close family member deal with the devastation of colon cancer that he knew without a doubt he wanted to specialize in the field of gastroenterology. 

Dr. Bemanian earned his Master of Science and Doctor of Medicine at Chicago Medical School. He completed his residency at the University of Southern California (USC), as well as his fellowship in gastroenterology/hepatology and liver transplantation. He is board-certified in gastroenterology/hepatology and internal medicine.

He has earned numerous awards throughout this medical career, including the Physicians of Excellence Award, the USC Resident of the Year, the American Liver Foundation/American Association for the Study of Liver Diseases Resident Scholar Award, and the USC Sabina Brautbar Resident Scholar Award. 

Dr. Bemanian’s special interests include colon cancer prevention, stomach and esophageal cancer detection, hemorrhoids treatment, nonsurgical weight-loss treatment, and advanced biliary interventional endoscopy. He incorporates the latest endoscopy technology in his procedures, diagnosing, preventing, and treating gastrointestinal disorders, including esophageal, gastric, and colon cancer.

To stay up to date on the latest advancements in his field, Dr. Bemanian is a member of the American College of Physicians, the American Medical Association, the American College of Gastroenterology, the Southern California Society of Gastroenterology, the Orange County Gastroenterology Association, and the Orange County Medical Association.

For Dr. Bemanian, the years of education, training, and hard work that led him down this path have provided the ability to focus on one goal: attending to the patient in front of him, no matter what the future of medicine holds.

Dr. Bemanian is native to Southern California and is fluent in Farsi/Persian. He enjoys spending time with his wife and children. 

Paul Lee, MD, MPH, MA, is a compassionate gastroenterologist at Digestive Disease Consultants of Orange County, with locations in Irvine, Huntington Beach, Tustin, and Foothill Ranch, California. 

Many people ask Dr. Lee why he chose to be a gastroenterologist, and for him the answer is simple: Instead of choosing this field, he thinks, more accurately, it chose him. He grew up with a close family member with Crohn’s disease. At that time, there were fewer options to treat this chronic disease, and he saw how it affected not only her body but also her mind and spirit. This sparked his passion. Gastroenterology is a great field to not only treat diseases but also to prevent them, which he finds incredible.

To achieve his goal of becoming a gastroenterologist, Dr. Lee earned his Doctor of Medicine from the George Washington University Medical School, and then went on to earn his Master of Public Health from the University of California School of Public Health. He completed his residency at the University of Southern California, followed by a fellowship in gastroenterology/hematology. He is board-certified in gastroenterology/hepatology and internal medicine.

As part of his work, Dr. Lee knows that diseases can present in different ways because every human is unique. He seeks to understand that uniqueness and uses it as a tool to better his patients’ health. This bio-psycho-social aspect of medicine is crucial in diagnosing, maintaining, and maximizing one’s GI health.

Throughout this career, Dr. Lee has earned several awards, including the Physicians of Excellence Award, and the Orange County Register and Orange County Medical Association Award in 2015, 2016, and 2017. He is a member of the American College of Gastroenterology, the American Society of Gastrointestinal Endoscopy, and the American College of Physicians.

For Dr. Lee, his one constant in medicine is that he loves what he does. And if patients can appreciate that, it is the right start in establishing that special connection: the doctor-patient relationship.

Dr. Lee founded Digestive Disease Consultants of Orange County in 2008. He strives to be a compassionate physician and a loving father of three children, and a husband to his lovely wife. 

His background in health food and nutrition broadens his perspective on medicine and treatment options. In addition to medicine, he regularly attends Redeemer Presbyterian Church, holds a black belt in tae kwon do, and enjoys travel, fine dining, and the arts.

Heba Ashraf, MD, FACP is a gastroenterologist at Digestive Disease Consultants of Orange County with locations in Irvine, Huntington Beach, Tustin and Foothill Ranch, California. She is dual board certified in Internal Medicine and Gastroenterology by the American Board of Internal Medicine.

She specializes in management of a wide array of gastrointestinal diseases including GERD, liver diseases/cirrhosis and inflammatory bowel disease. In addition to performing diagnostic and therapeutic upper and lower endoscopy, Dr. Ashraf also performs High Resolution Manometry, EndoFlip, pH testing and Capsule endoscopy.

She is a member of American Gastroenterological Association (AGA), the American College of Gastroenterology (ACG), the American Society of Gastrointestinal Endoscopy (ASGE) and American Association for the study of Liver Diseases (AASLD).

Dr. Ashraf grew up in New Jersey spending her days either at the shore or in the nearby cities. She went to Rutgers University then completed her medical school at Baqai Medical University in Pakistan. She completed her internal medicine residency at Beaumont Hospital in Michigan. After residency she became one of the first GI hospitalists at Thomas Jefferson University in Philadelphia. She then completed her GI fellowship at Michigan State/Ascension Providence Hospital.

She developed an interest in gastroenterology and nutrition early in her medical training. She has a fond interest in women’s health and prevention of gastrointestinal cancers. She believes her role as a physician is to provide her patients with accurate information and work as a team to accomplish their goals and improve overall health and well-being.

Dr. Ashraf has earned numerous awards throughout her medical career including Wayne State University Resident teaching award, Beaumont Resident Research Day Winner, and ACG Outstanding Poster Presenter.

Outside of work, she spends her time traveling and spending time with her 4 siblings. She also loves hiking and cooking. Dr. Ashraf is fluent in English, Urdu and Hindi.

Gastroenterologist Victor Yu, MD, considers himself extremely privileged to be able to comprehensively and compassionately care for people with digestive health issues at Digestive Disease Consultants of Orange County, with locations in Irvine, Huntington Beach, Tustin, and Foothill Ranch, California. Building a strong, trusting physician-patient relationship is a foundation he always strives to achieve, as he believes this is a vital step to treatment success. Treating each patient as if he or she were a member of his own family is a standard of care he upholds in his practice.

Dr. Yu earned his Doctor of Medicine from the University of Southern California (USC), Keck School of Medicine. He then completed his residency in internal medicine at USC as well as his fellowship in gastroenterology/hepatology and liver diseases. He is board-certified in gastroenterology/hepatology and internal medicine.

Dr. Yu specializes in medical disorders of the digestive system, including the esophagus, stomach, small intestine, colon, liver, gallbladder, pancreas, and hemorrhoids. His array of diagnostic and therapeutic techniques includes upper endoscopy (EGD), colonoscopy, capsule endoscopy, small intestine deep enteroscopy, and bile duct/pancreatic duct endoscopy (ERCP). He treats acute and chronic GI problems and focuses heavily on the prevention of diseases such as colon and esophageal cancer.

Dr. Yu joined Drs. Paul Lee and Shahrooz Bemanian in 2010 to help provide a comfortable and friendly medical office environment to meet the needs of their patients.

Dr. Yu is a Southern California native, fluent in Mandarin and medical Spanish, and excited to be practicing in the area where he grew up. When not hard at work, Dr. Yu enjoys traveling, reading, golf, basketball, and photography. 

Matthew Oman, MD, is a skilled gastroenterologist at Digestive Disease Consultants of Orange County, with locations in Irvine, Huntington Beach, Tustin, and Foothill Ranch, California.

Dr. Oman attended medical school at the University of Utah. He completed his residency at the University of Colorado and completed his fellowship in  Endoscopic Retrograde Cholangiopancreatography (ERCP) and Endoscopic Ultrasound (EUS) at Loma Linda University. He is board-certified in gastroenterology/hepatology and internal medicine.

When Dr. Oman entered medical school, many of his classmates knew the specialty they wanted to work in. However, he had an open mind and was excited to be exposed to the various specialties of medicine. When the time came to decide, he had noticed that he was most interested and happy when encountering patients with gastroenterology and hepatology health issues. While he is fascinated with the pathophysiology and medical side of this specialty, it was the technical, hands-on, endoscopic aspect that solidified his decision. 

He was amazed as a medical student the first time he saw a bleeding gastric ulcer treated endoscopically. While training in fellowship, he could see how endoscopy is much more and can relieve a variety of issues and symptoms for patients, from removing a gallstone lodged in the bile duct, opening a stricture in the esophagus so a patient can swallow again or draining a cyst through endoscopic ultrasound.

Dr. Oman has interests in colorectal cancer prevention and diagnosis, stomach and esophageal disorders, small bowel disorders, as well as pancreas and biliary disorders, which include advanced pancreatic and biliary diagnosis and intervention (ERCP, EUS). 

Throughout his career, he has earned numerous awards, including the Resident Consultant of the Year (Loma Linda Family Medicine) and the Internal Medicine Subspecialty Fellow of the Year (Loma Linda Internal Medicine). He is also a member of several organizations, including Alpha Omega Alpha, the American Society of Gastrointestinal Endoscopy, the American College of Gastroenterology, the American Gastroenterology Association, and the Southern California Society of Gastroenterology.

He spends his time away from work with his wife and young son but still tries to go hiking, mountain biking, and indoor rock climbing.

Essam Quraishi, MD, is a board-certified gastroenterologist and the founder of Gastrointestinal and Liver Consultants in Santa Ana, Irvine, and Anaheim, California.

Dr. Quraishi graduated from medical school at Deccan College of Medical Sciences in Hyderabad, India. Moving to the United States, he completed his internal medicine residency at Henry Ford Hospital in Detroit, Michigan, and remained for his fellowship in gastroenterology in 2005. During his fellowship, Dr. Quraishi participated in multiple studies and presented original research on quality control in screening colonoscopies. Dr. Quraishi presented this research at several national gastroenterology conferences. Later in his career, Dr. Quraishi’s painstaking work on pancreatitis in patients with renal failure was published to high acclaim. 

Dr. Quraishi has a deep interest in general gastroenterology and hepatology and is well-equipped to handle all general pathology in these areas. His areas of interest include viral hepatitis, inflammatory bowel disease, and screening for colon cancer. Dr. Quraishi is well versed with the latest therapies for Hepatitis C, including interferon and ribavirin sparing treatment. He is experienced in administering the newest therapies for Crohn’s disease and Ulcerative Colitis. 

Dr. Quraishi believes in cultivating relationships with his patients and treating each patient as a whole. His philosophy is that you cannot treat an ailment the same for every patient; instead, each patient has to be approached individually, and the provider must tailor a treatment plan to fit the needs of each patient.

Dr. Quraishi enjoys playing chess, tennis, and soccer when not at the office. He also enjoys spending his free time with his lovely wife, Dr. Fatima, and their three young children.

Board-certified gastroenterologist Javed Sadiq, MD, offers superior services for his patients at Gastrointestinal & Liver Consultants in Santa Ana, Irvine, and Anaheim, California. 

Dr. Sadiq is a well-rounded medical professional with extensive experience in the field of gastroenterology. He holds a Bachelor of Science degree from the University of California Riverside with a Dean/Chancellor Academic Scholarship and went on to pursue a medical degree from Ross University School of Medicine. He graduated medical school magna cum laude (high honors).

After completing his medical degree, Dr. Sadiq underwent residency training in internal medicine at the State University of New York. He later completed a fellowship in gastroenterology at the same institution. Over the years, he has held several faculty positions in the division of gastroenterology and hepatology at several medical centers, including Arrowhead Regional Medical Center, St. Bernardine Medical Center, and San Bernardino Community Hospital. He served as the Chief Medical Officer at Mt. View Surgical Center.

Dr. Sadiq is highly skilled in various gastroenterology procedures such as screening and diagnostic colonoscopy, therapeutic colonoscopy, upper endoscopy, PEG placement, capsule endoscopy, and Bravo placement and analysis. He is board-certified by the American Board of Internal Medicine and the American Board of Gastroenterology and holds active medical licenses in California and New York. Dr. Sadiq has published several peer-reviewed journal articles and abstracts in the field of gastroenterology, including works on acute pancreatitis, stent-related complications, chronic pancreatitis pain, and more. With his broad range of experience, knowledge, and dedication he has been an asset to his patients.

In his free time, Dr. Sadiq enjoys staying updated on technology news, going for bike rides, and trying new cuisines from around the world. He is also fluent in English, Farsi/Persian, and Spanish.

Essam Quraishi, MD, is a board-certified gastroenterologist and the founder of Gastrointestinal and Liver Consultants in Santa Ana, Irvine, and Anaheim, California.

Dr. Quraishi graduated from medical school at Deccan College of Medical Sciences in Hyderabad, India. Moving to the United States, he completed his internal medicine residency at Henry Ford Hospital in Detroit, Michigan, and remained for his fellowship in gastroenterology in 2005. During his fellowship, Dr. Quraishi participated in multiple studies and presented original research on quality control in screening colonoscopies. Dr. Quraishi presented this research at several national gastroenterology conferences. Later in his career, Dr. Quraishi’s painstaking work on pancreatitis in patients with renal failure was published to high acclaim. 

Dr. Quraishi has a deep interest in general gastroenterology and hepatology and is well-equipped to handle all general pathology in these areas. His areas of interest include viral hepatitis, inflammatory bowel disease, and screening for colon cancer. Dr. Quraishi is well versed with the latest therapies for Hepatitis C, including interferon and ribavirin sparing treatment. He is experienced in administering the newest therapies for Crohn’s disease and Ulcerative Colitis. 

Dr. Quraishi believes in cultivating relationships with his patients and treating each patient as a whole. His philosophy is that you cannot treat an ailment the same for every patient; instead, each patient has to be approached individually, and the provider must tailor a treatment plan to fit the needs of each patient.

Dr. Quraishi enjoys playing chess, tennis, and soccer when not at the office. He also enjoys spending his free time with his lovely wife, Dr. Fatima, and their three young children.

Board-certified gastroenterologist Javed Sadiq, MD, offers superior services for his patients at Gastrointestinal & Liver Consultants in Santa Ana, Irvine, and Anaheim, California. 

Dr. Sadiq is a well-rounded medical professional with extensive experience in the field of gastroenterology. He holds a Bachelor of Science degree from the University of California Riverside with a Dean/Chancellor Academic Scholarship and went on to pursue a medical degree from Ross University School of Medicine. He graduated medical school magna cum laude (high honors).

After completing his medical degree, Dr. Sadiq underwent residency training in internal medicine at the State University of New York. He later completed a fellowship in gastroenterology at the same institution. Over the years, he has held several faculty positions in the division of gastroenterology and hepatology at several medical centers, including Arrowhead Regional Medical Center, St. Bernardine Medical Center, and San Bernardino Community Hospital. He served as the Chief Medical Officer at Mt. View Surgical Center.

Dr. Sadiq is highly skilled in various gastroenterology procedures such as screening and diagnostic colonoscopy, therapeutic colonoscopy, upper endoscopy, PEG placement, capsule endoscopy, and Bravo placement and analysis. He is board-certified by the American Board of Internal Medicine and the American Board of Gastroenterology and holds active medical licenses in California and New York. Dr. Sadiq has published several peer-reviewed journal articles and abstracts in the field of gastroenterology, including works on acute pancreatitis, stent-related complications, chronic pancreatitis pain, and more. With his broad range of experience, knowledge, and dedication he has been an asset to his patients.

In his free time, Dr. Sadiq enjoys staying updated on technology news, going for bike rides, and trying new cuisines from around the world. He is also fluent in English, Farsi/Persian, and Spanish.