In an effort to provide uninterrupted patient care and support social distancing during the COVID-19 pandemic, telehealth appointments are now available. Call (410) 224-2116 to schedule an appointment.

Our Providers

Suzanne L. Sankey, MD

Suzanne L. Sankey, MD

Dr. Suzanne Sankey attended Gettysburg College for her undergraduate studies and received her medical degree from the Medical College of Pennsylvania, where she also completed her residency training in internal medicine and then served as chief resident. She performed her fellowship training in gastroenterology at Thomas Jefferson University in Philadelphia.

Board certified in gastroenterology, Dr. Sankey is a compassionate, sensitive physician dedicated to promoting women’s health issues in her field. She resides locally with her family.

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Christopher F. Schultz, MD

Christopher F. Schultz, MD

Dr. Christopher Schultz completed his undergraduate studies at Muhlenberg College in Allentown, Pennsylvania and was elected to the Phi Beta Kappa national honor society. He received his medical degree from the University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School. 

After completing his residency training in internal medicine at Thomas Jefferson University Hospital in Philadelphia, Dr. Schultz pursued his fellowship training in gastroenterology at the University of Pennsylvania. Upon graduation, Dr. Schultz joined the Department of Medicine faculty at the University of Pennsylvania and served as assistant professor of medicine until joining AAGA. 

Board certified in gastroenterology, Dr. Schultz has authored scientific papers, lectured extensively, and conducted research in the field of gastroenterology and hepatology. His special interests include general gastroenterology and diseases of the liver. Dr. Schultz resides in Baltimore.



Melanie L. Jackson, MD, FACG

Melanie L. Jackson, MD, FACG

Dr. Melanie Jackson is a native of Philadelphia and graduated with cum laude honors from Morgan State University in Baltimore, Maryland. She received her medical degree from Howard University College of Medicine in Washington, DC and was elected to the Alpha Omega Alpha Medical Honor Society. 

Dr. Jackson served her residency in internal medicine at Columbia Presbyterian Medical Center in New York and completed her gastroenterology fellowship at Washington Hospital Center in Washington, DC. Additional postgraduate training included a hepatology research program at the National Institutes of Health in Maryland. 

Dr. Jackson is affiliated with the American Gastroenterology Association, American Society of Gastrointestinal Endoscopy, and the National Medical Association. She is board certified in gastroenterology and a fellow of the American College of Gastroenterology (FACG). She has published several papers regarding digestive care and has appeared on local television and radio as a digestive health expert. 

Dr. Jackson has special interests in colon cancer awareness, nutrition, and liver disease. She is a member of the Delta Sigma Theta Sorority, Inc.


Praveena G. Velamati, MD

Praveena G. Velamati, MD

Dr. Praveena 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, NC. 

Dr. Velamati then pursued her gastroenterology fellowship at Johns Hopkins Bayview Medical Center in Baltimore, MD, 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 she 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 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.


Christopher A. Olenec, MD

Christopher A. Olenec, MD

Dr. Christopher Olenec graduated from Northwestern University and the University of Notre Dame Law School. After law school he worked in Washington, DC in health care policy prior to attending medical school at Rush Medical College in Chicago, Illinois. 

After medical school, Dr. Olenec completed his internship and internal medicine residency at Dartmouth-Hitchcock Medical Center in Lebanon, New Hampshire. He returned to Rush University Medical Center for his gastroenterology fellowship, where he received specialized training in interventional procedures, including endoscopic ultrasound. 

Dr. Olenec worked as an instructor at the University of Wisconsin and in private practice at Sarasota Memorial Hospital prior to joining AAGA. Board certified in internal medicine and gastroenterology, Dr. Olenec's areas of interest include gastrointestinal malignancies and advanced endoscopic procedures including endoscopic ultrasound, ERCP, and endoscopic treatment of Barrett’s esophagus.

Dr. Olenec played water polo in college, has competed in marathons, and has completed an IRONMAN triathlon.


Thomas L. Simcox, MD

Thomas L. Simcox, MD

Born and raised in northern California, Dr. Thomas 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 pursued gastroenterology and hepatology fellowship training within 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. 

Board certified in internal medicine and gastroenterology, Dr. Simcox's areas of interest include acid reflux, gastrointestinal malignancies, and liver disorders. He lives in Annapolis with his wife, who is a pediatrician at Annapolis Pediatrics. He enjoys travel, snow and water sports, and running.


Raja Taunk, MD

Raja Taunk, MD

Raised in New Jersey, Dr. Raja Taunk graduated magna cum laude from Tufts University in Medford, Massachusetts, where he competed on the crew team. He then earned his medical degree at Rutgers University – New Jersey Medical School where he was elected into the Alpha Omega Alpha National Medical Honor Society. 

Dr. Taunk completed his internal medicine residency at Cornell New York Presbyterian Hospital followed by fellowship training in gastroenterology at Lenox Hill Hospital in Manhattan. He has authored scientific papers and book chapters, conducted research, and lectured in the field of gastroenterology and hepatology. He was also invited to speak and was featured on the Dr. Oz television show. 

Board certified in internal medicine and gastroenterology, Dr. Taunk holds a national leadership position on the ethics committee of the American Gastroenterological Association. His areas of interest include inflammatory bowel disease, colon cancer screening, acid reflux, and complex polypectomy.

Dr. Taunk is an avid traveler and has run with the bulls in Spain. He is a certified scuba diver, a novice golfer, and an avid sports fan.

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Mark Flasar, MD, MS

Mark Flasar, MD

A local Marylander, Dr. Mark 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 National Medical Honor 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 in Chapel Hill. 

Dr. Flasar has been a faculty member, associate director of the inflammatory bowel disease program, and fellowship training director in the Division of Gastroenterology and Hepatology at the University of Maryland School of Medicine. He has held national leadership positions within the American Gastroenterology Association and Crohn’s & Colitis Foundation of America, and he serves as review and section editor for several scientific journals. 

Board certified in gastroenterology, 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. He narrowly escaped attending art school, decided that one marathon was plenty, and is passionate about local sports.


David S. Jencks, MD

Dr. Jencks, MD

Dr. Jencks completed medical school at the George Washington University in Washington, DC, where he was elected into the Alpha Omega Alpha National Medical Honor Society. He completed his internship and residency at Stanford University Hospital in Palo Alto, California, and his fellowship at George Washington University.

Board certified in gastroenterology, Dr. Jencks has a particular interest in the prevention of esophageal and colon cancers, and the management of inflammatory bowel disease.

Dr. Jencks is accepting new patients in the Annapolis and Pasadena office locations.


Amanda M. Era, CRNP

Amanda M. Era, CRNP

After graduating from Salisbury University with a bachelor of science in nursing, Amanda earned a master of science in nursing with a focus on adult primary care from the University of Maryland. She was a clinical instructor for undergraduate nursing students at the University of Maryland, where she taught fundamental nursing theory and clinical skill.

As an RN, Amanda participated in a nursing fellowship at the University of Maryland Shock Trauma Center. A member of the American Academy of Nurse Practitioners, Amanda has been a practicing nurse practitioner since 2006. Her interests include diet-related gastrointestinal disorders and general gastroenterology.

When she is not working, Amanda enjoys staying active with her two children. She has also completed multiple marathons and an IRONMAN triathlon.


Sarah M. Moffett, CRNP

Sarah M. Moffett, CRNP

Sarah graduated with honors from Salisbury University, with a Bachelor of Science in Nursing. After nursing school, Sarah worked as an RN in a variety of settings, including the step-down intensive care unit, as well as endoscopy. She went on to graduate from Wilmington University with a Master of Science in Nursing, with a focus in family practice.

She is an active member of the American Academy of Nurse Practitioners, as well as the nursing honor society, Sigma Theta Tau. Outside of work, Sarah enjoys spending time with her husband and daughter. She also enjoys spending time at the beach, hiking, and watching football.

Sarah focuses on providing an individualized, empathetic, evidence-based approach for treating her patients.


Anneke Langenhoven, CRNP

Sarah M. Moffett, CRNP

Anneke graduated from York College of Pennsylvania’s Adult-Gerontology Nurse Practitioner program in 2018. Prior to becoming a nurse practitioner, Anneke completed her nursing degree with honors at the University of Maryland. Upon finishing, she worked in an intensive care unit for over 6 years where she gained valuable experience caring for acutely ill patients including a wide variety of gastrointestinal illnesses.

Anneke is an active member of the American Academy of Nurse Practitioners and focuses on providing high quality, compassionate and evidence based care.

In her spare time, Anneke enjoys spending time with friends and family and traveling every chance she gets. 


Nicole Dennis, CRNP

Nicole Dennis, CRNP

Nicole grew up in Columbus, Ohio graduating high school at 16 years old and migrated to Washington, D.C. at the age of 17. Her dream since childhood was to pursue a career in healthcare. She earned her Bachelor of Science in Nursing with cum lade honors from Trinity Washington University. Later, she earned her Master of Science in Nursing from Bowie State University- Family Nurse Practitioner program.

Nicole was a travel nurse for more than six years. Traveling throughout the DC metropolitan area servicing various health facilities including, Anne Arundel Medical Center, University of Maryland, and The Johns Hopkins Hospital.

She has experience in homeopathic medicine, vascular surgery, critical care, federal occupational health, and orthopedic rehabilitation. In her spare time, Nicole enjoys traveling worldwide, visiting new restaurants, and spending time with her family.


Tracy Turner, CRNP

Tracy Turner, CRNP

Tracy graduated from Notre Dame of Maryland University with a Bachelor of Science in Nursing. She has provided quality nursing in a variety of settings including Intensive Care, pre-operative and post-operative care units as well as the Cardiac Catherization Lab. She also has experience with complex medical and trauma care management.

Tracy earned her Master of Science in Nursing from Chamberlain University, with a focus of Family Nurse Practitioner. She has experience in Internal Medicine and is an active member of the American Academy of Nurse Practitioners. Her practice involves providing high quality, individualized and evidence-based care.

In her spare time, Tracy enjoys traveling, reading, hiking and spending time with her family.