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.
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, with locations in Annapolis, Columbia, Olney, Riverdale, Timonium and Gaithersburg, Maryland, is a medical facility that offers treatment for a variety of gastrointestinal and liver disorders:
Management of a complete range of Gastrointestinal, Liver and Pancreatic disorders, including Acid reflux/GERD, Stomach ulcers, Celiac disease, Irritable bowel syndrome, Colitis & Crohn’s Disease, Liver disease, Hemorrhoids and Constipation, Rectal bleeding etc.
Onsite Ambulatory Surgery Centers with State of the Art HD equipment, GI Genius™GIQuiC participation, and with accreditation from the Accreditation Associates for Abulatory Health Care, Inc. (AAAHC.)
Innovative and cutting edge Diagnostics and Medical Treatment- including Bravo pH Testing, PillCam SB Capsule Endoscopy, STRETTA anti-reflux procedure, Orbera intragastric balloon procedure for weight loss and more.
IBD Infusion Center for Biologic (Remicade, Entyvio, Stelara) and Injectafer infusions.
These are only a few of the many gastrointestinal conditions treated on a regular basis. Patients are offered individualized treatment plans based on state-of-the-art diagnostic tools and techniques that provide them with accurate and complete information. The professional staff at the facility have many years of experience to provide their patients with the most innovative and advanced treatments possible. The Providers focus on a comprehensive and Integrative treatment plan.
Gastro Center of Maryland is currently welcoming new patients, call or book an appointment online today!
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
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.
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.
living in and around Annapolis, Odenton, and Greenbelt, Maryland.
Raza Hasan, MD, is a highly skilled gastroenterologist at Anne Arundel Gastroenterology Associates, P.A. He is proud to provide compassionate, dedicated care to patients living in and around the Pasadena, Maryland, area. Dr. Hasan's particular areas of interest include gastrointestinal motility disorders, esophageal disease, and colon cancer prevention.
Originally from Baltimore, Maryland, Dr. Hasan attended an accelerated six-year combined bachelor and medical degree program at the University of Missouri-Kansas City. He was elected into the Alpha Omega Alpha Honor Medical Society and subsequently graduated magna cum laude.
Dr. Hasan completed his internship and residency at Thomas Jefferson Medical Center in Philadelphia, Pennsylvania, and his fellowship at Loyola University Medical Center in Chicago, Illinois.
In his free time, Dr. Hasan loves to travel abroad and has a checklist of trying to swim in every large body of water in the world.
Dr. Hasan is currently accepting new patients and welcomes new patients to Anne Arundel Gastroenterology Associates, P.A. Schedule an appointment by calling or booking a consultation online today.
Praveena G. Velamati, MD, is a board-certified gastroenterologist at Anne Arundel Gastroenterology Associates, P.A., serving patients in Annapolis and Odenton, Maryland.
Dr. Velamati completed an accelerated bachelor's and medical degree program at Eastern Virginia Medical School, followed by her internal medicine residency at Carolinas Medical Center in Charlotte, North Carolina.
She then pursued her gastroenterology fellowship at Johns Hopkins Bayview Medical Center in Baltimore, Maryland, where she served as chief fellow during her final year and received the Service Excellence Award for outstanding patient care and compassion. While at Johns Hopkins, Dr. Velamati also published scientific papers in the fields of digestive diseases and hepatology.
Dr. Velamati specializes in general gastroenterology with a focus on women’s health issues. Board certified in gastroenterology, she was voted Top Docs from 2015-2016 for gastroenterology by What’s Up? Magazine – Annapolis by area physicians.
Dr. Velamati has lived in the area for over 10 years with her husband and two children. She enjoys traveling, gardening, and football.
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.
Thomas L. Simcox, MD, is proud to provide comprehensive gastroenterology care at Anne Arundel Gastroenterology Associates, P.A. in Annapolis and Kent Island, Maryland. Board-certified in internal medicine and gastroenterology, Dr. Simcox's areas of interest include acid reflux, gastrointestinal malignancies, and liver disorders.
Born and raised in northern California, Dr. Simcox graduated from the University of California, Davis in 2002 and subsequently spent 18 months in a genetics research lab. He moved to Virginia to attend Virginia Commonwealth University School of Medicine, where he received his medical degree.
Dr. Simcox completed his internal medicine internship and residency at the University of Maryland Medical Center in Baltimore. He then completed his gastroenterology and hepatology fellowship training with the University of Maryland and the National Institutes of Health Scholars program. Dr. Simcox has presented his research in gastrointestinal disorders at the nation's largest gastroenterology conferences.
He lives in Annapolis with his wife, who is a pediatrician at Annapolis Pediatrics. He enjoys travel, snow and water sports, and running.
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.
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.
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.
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. 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.
/assets/images/provider/photos/2323978.png)
/assets/images/provider/photos/2323978.png)
/assets/images/provider/photos/2332417.png)
/assets/images/provider/photos/2332417.png)
/assets/images/provider/photos/2323970.png)
/assets/images/provider/photos/2323970.png)
/assets/images/provider/photos/2323998.png)
/assets/images/provider/photos/2323998.png)
/assets/images/provider/photos/2323988.png)
/assets/images/provider/photos/2323988.png)
