Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Allen Blosser, MD, is a dedicated board-certified physician who specializes in gastroenterology, and modern bariatric surgical procedures. He welcomes patients to Endoscopic Wellness Center of America, located in Reston, Virginia.
Dr. Blosser attained his undergraduate education at the University of Virginia. During his tenure, he excelled in athletics and academics. He was honored as an ACC Honor Roll Student-Athlete in 1980-81 and graduated with distinction from the University with a Bachelor of Arts in Chemistry/Biochemistry in 1984.
He attended Eastern Virginia Medical School in Norfolk, Virginia, where he graduated in 1988. He was honored with an Osler Internship at Johns Hopkins Medical Center in 1983. He performed his Residency in Internal Medicine and Fellowship in Gastroenterology/Hepatology at Georgetown University Medical Center from 1988-1993. He was honored as the IMA Georgetown Resident of the Year in 1991 at the conclusion of his residency program.
He has served the DC and Northern Virginia communities in his current role as President of Gastrointestinal Medicine Associates and the Gastroenterology Center of Virginia since 1993.
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.
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
Gastro Center of Maryland (GCM) is one of the largest GI group practices in the state. We provide expert, compassionate care across multiple locations for a wide range of digestive and liver conditions.
We treat everything from acid reflux and IBS to Crohn’s disease, liver disorders, and colon cancer screenings. Our experienced providers use the latest technology to create personalized treatment plans focused on your individual needs.
Our state-of-the-art Ambulatory Surgery Centers offer advanced procedures such as Bravo pH testing, PillCam capsule endoscopy, STRETTA for reflux, and Orbera for weight loss. We also provide onsite pathology and an IBD Infusion Center for faster, more accurate care in one place.
Appointments are easy to schedule with same-week and NextDay GI availability to fit your busy life.
At GCM, we are here to help you feel your best every step of the way. We are currently welcoming new patients. Call or book online today to get started.
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
Board certified in gastroenterology, David S. Jencks, MD, is proud to provide personalized care to patients at Anne Arundel Gastroenterology Associates, P.A. in Annapolis and Pasadena, Maryland. He has a particular interest in the prevention of esophageal and colon cancers and the management of inflammatory bowel disease.
Dr. Jencks completed medical school at The George Washington University in Washington, DC, where he was elected into the Alpha Omega Alpha Honor Medical Society. He then completed his internship and residency at Stanford University Hospital in Palo Alto, California. Dr. Jencks then returned to The George Washington University to complete his fellowship training.
At Anne Arundel Gastroenterology Associates, Dr. Jencks is passionate about helping patients achieve optimal health. He strives to educate patients about their conditions and ensure their questions are answered.
Dr. Jencks is currently accepting new patients and looks forward to partnering with them on their health care journey. Schedule an appointment with Dr. Jencks by calling the office or booking a consultation online today.
Patryk Madrid, DNP, FNP-C, is a gastroenterology nurse practitioner at Anne Arundel Gastroenterology Associates, P.A., serving patients in Annapolis and surrounding areas.
Dr. Madrid completed his undergraduate studies at Arizona State University in Kinesiology and Health Sciences, and at Warner Pacific University in Nursing. He received his nurse practitioner doctoral degree from the Johns Hopkins University in Baltimore, Maryland.
Dr. Madrid has worked in several healthcare roles for over 15 years including endoscopy, oncology, education, emergency medicine, integrative medicine, and military healthcare administration. Dr. Madrid is a member of the Gastroenterology and Hepatology Advanced Practice Providers (GHAPP) and the American Association of Nurse Practitioner (AANP). Most recently, Dr. Madrid held a faculty position with the Johns Hopkins School of Nursing teaching gastroenterology, health assessment, pathophysiology, and other nursing education.
Dr. Madrid strives to deliver high-quality healthcare that is empathetic, comprehensive, and equitable. His clinical approach is integrative with an understanding that treatment plans are uniquely tailored to each patient. Outside of work, Dr. Madrid enjoys reading comics, indoor cycling, being outside, and spending time with his husband, dogs, and cats.
Mark Flasar, MD, MS, is a board-certified gastroenterologist at Anne Arundel Gastroenterology Associates, P.A. in Annapolis and Pasadena, Maryland. Dr. Flasar advocates using patient education to inform shared decision-making and has a special interest in inflammatory bowel diseases, small intestine disorders, and general gastroenterology.
A local Marylander, Dr. Flasar graduated from the University of Maryland, College Park in 1996. A committed Terrapin, he earned his medical degree from the University of Maryland School of Medicine in Baltimore, where he was elected into the Alpha Omega Alpha Honor Medical Society.
Dr. Flasar completed his internal medicine residency at Duke University before returning to the University of Maryland in 2004 for his gastroenterology and hepatology fellowship. While there, he obtained a master’s degree in clinical research and completed an externship in inflammatory bowel diseases at the University of North Carolina at Chapel Hill.
At the University of Maryland School of Medicine, Dr. Flasar has been a faculty member in addition to serving as the associate director of the inflammatory bowel disease program and a fellowship training director in the Division of Gastroenterology and Hepatology. He has held national leadership positions within the American Gastroenterology Association and the Crohn’s & Colitis Foundation of America. He also serves as a review and section editor for several scientific journals.
Dr. Flasar found his calling in medicine and narrowly escaped attending art school. In his free time, he is passionate about local sports.
Dabo Xu, MD, is a board-certified physician in gastroenterology, hepatology, and internal medicine at the Gastro Center of Maryland, with locations in Annapolis, Columbia, Olney, Riverdale, Timonium and Gaithersburg, Maryland.
Dr. Xu treats a wide variety of conditions at the practice, including gastroesophageal reflux disease (GERD), ulcerative colitis and Crohn’s disease, irritable bowel syndrome (IBS), celiac disease, colon cancer, liver disease, and other gastrointestinal conditions.
Dr. Xu completed his medical residency at St. Agnes Hospital, as well as a gastroenterology fellowship at the University of Michigan. He has conducted clinical and translational research on several topics, such as GERD, intestinal inflammation, liver diseases and cancers, and gastrointestinal pharmacology.His works were published in the most prestigious gastroenterology journals and presented at national and international medical conferences.
He has more than 20 years of clinical experience in gastroenterology and hepatology. Dr. Xu has a special interest in preventive care, often working alongside patients to prevent disease and improve their quality of life through precise and effective personalized treatments.
With a passion and dedication to patient experiences, Dr. Xu believes it’s important to build relationships with those in his care and enjoys helping patients find better health and wellness.
Gastro Center of Maryland (GCM) is one of the largest GI group practices in the state. We provide expert, compassionate care across multiple locations for a wide range of digestive and liver conditions.
We treat everything from acid reflux and IBS to Crohn’s disease, liver disorders, and colon cancer screenings. Our experienced providers use the latest technology to create personalized treatment plans focused on your individual needs.
Our state-of-the-art Ambulatory Surgery Centers offer advanced procedures such as Bravo pH testing, PillCam capsule endoscopy, STRETTA for reflux, and Orbera for weight loss. We also provide onsite pathology and an IBD Infusion Center for faster, more accurate care in one place.
Appointments are easy to schedule with same-week and NextDay GI availability to fit your busy life.
At GCM, we are here to help you feel your best every step of the way. We are currently welcoming new patients. Call or book online today to get started.
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 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. Rai is considered a national thought leader and expert in the field of Gastroenterology and liver disease. He was named a Baltimore Magazine top doctor in 2016, 2017 and 2019, 2021, 2022, 2024 and a Washingtonian Magazine top doctor in 2018 and 2020.
Dr. Rai currently serves as the medical director at the gastro center of Maryland. He has served on the medical faculty at Johns Hopkins University in the division of Gastroenterology & Hepatology for more than 12 years, where he served as Medical Director of adult liver transplantation. He is a Board-Certified Gastroenterologist & Hepatologist, with over 22 years of experience. He completed his Gastroenterology & Hepatology Fellowship at Johns Hopkins University in 1996 and completed an additional year of Advanced Fellowship at Johns Hopkins University.
Dr. Rai presents regularly at national and regional meetings and has received many awards including Excellence in Clinical Research Award from the American College of Gastroenterology, Passano Clinician Scientist Award from Johns Hopkins University, Industry Research Scholar Award & Astra-Merck Award from the American Digestive Health Foundation, among others. He has published dozens of scholarly articles in peer reviewed journals and authored many chapters for medical textbooks. He has performed over 100,000 procedures in this field and pioneered new and innovative medical techniques.
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.
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