Serving the Lehigh Valley area

Gastroenterology Associates LTD. Allentown & Bethlehem, PA Twitter_Icon_1C copy facebook color

Meet the Team

Graduated from Jefferson Medical School in Philadelphia, where he also completed his internship and residency training. He is board-certified in internal medicine and gastroenterology and has been in private practice since 1976. Dr. Brooks is married and has three grown children. His “after hours” interests include classical music and travel.

Charles M. Brooks M.D.

Graduated from Hahnemann University in Philadelphia and completed his internship as well as his residency at Hahnemann Affiliated Hospitals. He is a Diplomat at the American Board of Internal Medicine and Gastroenterology. He has been in private practice since 1990.  Dr. Pickle is married and has one son. His interests include golf, numismatics, and travel.

J. Harry Pickle, IV M.D.

Graduated from the Pennsylvania State College of Medicine in Hershey and completed his internship and residency in internal medicine as well as his fellowship in gastroenterology at Case Western Reserve in Cleveland. He is board certified in gastroenterology. He enjoys practicing gastroenterology, with an emphasis on colon cancer prevention, acid reflux, Barrett’s esophagus and liver disease. He is married to Dr. Stacy Lacey, a pediatrician. They have four children. His “after hours” interests include spending time with his family, sports, and travel.

Sean Lacey M.D.

Graduated from the University of Athens School Of Medicine, in Athens, Greece and completed his fellowship at the Medical College of Wisconsin in Milwaukee. He also completed and advanced endoscopy fellowship in ERCP and endoscopic ultrasound at Northwestern Hospital in Chicago. He is board certified in Gastroenterology. He is married and has seven children. In His “after hours” he spends time with his family and has an interest in Greco-Roman history, and philosophy.

Sotirios Vasilopoulos M.D.

Charles Brooks MD | Gastroenterologist

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Sarah Ferreira, CRNP

Marcella Zamborsky, PA-C

Rosanne Day, PA-C

J.Harry Pickle IV, MD | Gastroenterologist Sean Lacey, MD | Gastroenterologist Sotirios Vasilopoulos, MD | Gastroenterologist Marcella Zamborsky, PA-C Rosanne Day, PA-C Sarah Ferreira, CRNP

Colleen Gilhool, CRNP

Graduated with a Bachelor's Degree in Biology from Moravian College in Bethlehem and completed a Master's Degree in Physician Assistant Studies from DeSales University in Center Valley. She is a board certified Physician Assistant, who has been specializing in gastroenterology since 2007. She is a member of the American Gastroenterological Association, as well as the American Academy of Physician Assistants and Pennsylvania Society of Physician Assistants. Her interests outside gastroenterology include fitness, travel and spending time with her family.

Graduated from Wilkes University with a Bachelors Degree in Nursing. Completed a Masters degree in Nursing/Nurse Practitioner studies from DeSales University. Member of the American Association of Nurse Practitioners. Board certified in Family Practice. Sarah is married and has two children and three grandchildren. Her interests include, recreational cycling, reading and enjoying her growing family.

Rosanne Day received her BS from Temple University and MS in Physician Assistant Studies from DeSales University. She is a member of the Pennsylvania Society of Physician Assistants and American Academy of Physician Assistants. She is married with two children and her recreational activities include skiing, hiking, reading and music.

Colleen Gilhool, CRNP

Colleen graduated from Misericordia University with a Bachelors Degree in Nursing. She worked as a nurse at Lehigh Valley Hospital for 12 years then obtained her Masters degree in Nursing/Nurse Practitioner from DeSales University. She is a Board certified Family Nurse Practitioner. She is a member of the American Association of Nurse Practitioners as well as the American Academy of Nurse Practitioners. Her interests include traveling, hiking, sports, and spending time with her family.