Phone: (603) 314-6900
Fax: (603) 314-6909
Hours: Monday through Friday: 8:00 a.m. to 5:00 p.m.
Harvard Medical School MD 2002
Brigham and Women's Hospital
Massachusetts General Hospital
American Board of Internal Medicine, Gastroenterology, 2008
American Board of Internal Medicine, Internal Medicine, 2007
Albert Einstein College of Medicine
Beth Israel Deaconess Medical Center/Harvard Medical School
Massachusetts General Hospital/Harvard Medical School
American Board of Internal Medicine, 2014
American Board of Gastroenterology, 2017
Dr. Keroack has dedicated his career to patient care and medical education. He is proud to join the Elliot and is looking forward to caring for the community and partnering with his patients for their healthcare needs.
Tufts University School of Medicine, 1988
University of Massachusetts Medical Center
American Board of Internal Medicine, Gastroenterology, 1997
American Board of Internal Medicine, Internal Medicine, 1991
Marshfield Clinic Eau Claire Center
Eau Claire, WI
Massachusetts General Hospital
Two Time Teacher of The Year Award
Instructor in Medicine
Harvard Medical School
Lynnfield Medical Associates
Lynnfield Medical Associates
Gastroenterologist, Pentucket Medical (full-time private practice)
· Early adopter of all Capsule Endoscopy technologies
· Invited to lecture on Capsule Endoscopy - University of Hong Kong, China
· NECN Interview & live patient demonstration of Esophageal Capsule Endoscopy
· Taught Capsule Endoscopy courses for Gastroenterologists
· Smartpill Capsule Motility clinical research publications
Clinical Fellowship 1999-2003 Massachusetts General Hospital
(Gastroenterology) Boston, MA
Fellowship 2000-2003 Department of Surgical Research
(Angiogenesis) Children’s Hospital, Boston, MA
Staff Fellowship 1995-99 National Institutes of Health
(Gene Therapy) Bethesda, MD
Medical Staff Fellow 1993-95 RNA and Protein Biosynthesis Section,
(Molecular Hematology) Molecular Hematology Branch
National Heart, Lung, and Blood Institute
Commissioned Officer 1993-99 United States Public Health Service
Clinical Associate 1992-93 National Heart, Lung, and Blood Institute
(Internal Medicine) Bethesda, MD
Strong Memorial Hospital
(Internal Medicine) University of Rochester
M.D. 1990 Tufts University School of Medicine Boston, MA
B.A. 1983 Colgate University Hamilton, NY
1994 Diplomate, American Board of Internal Medicine
Internal Medicine Recertified through 12/31/2023
2003 Diplomate, American Board of Internal Medicine
Gastroenterology Recertified through 12/31/2023
Joyce Agarwal, APRN has been board certified by the American Nurses Credentialing Center as a Nurse Practitioner since 2012 when she earned a Master of Science in Nursing at Rivier College in Nashua, NH. Prior to that, she worked for many years in both clinical and management positions as a Registered Nurse. Joyce joined Elliot Health System in 2013 as family nurse practitioner and transferred to the Elliot Gastroenterology team in 2018.
Sharon Barker, APRN has been Board Certified by the American Nurses Credentialing Center since 1998 as a Family Nurse Practitioner. She received her Master of Science Degree as a Family Nurse Practitioner from Rivier College, Nashua, NH. Sharon began her career as a Registered Nurse with an Associate Degree in Nursing in 1982 from Northern Essex Community College, Haverhill, MA and completed her Bachelor of Science Degree in Nursing at the University of New Hampshire in 1995.
Prior to completing her education as a Family Nurse Practitioner, she had twelve years of experience in the ICU at Holy Family Hospital in Methuen, MA. Sharon has enjoyed being a preceptor for many Nurse Practitioner students from various local colleges over the years. Her past employment as a Nurse Practitioner includes: Urgent Care, Family Practice, Internal Medicine as well as six years of Gastroenterology experience with a southern NH private practice. It was her love for this specialty that brought her to Elliot Gastroenterology in February of 2012.
Lisa Cariello, PA-C graduated with a Master’s Degree in Physician Assistant Studies from Seton Hall/University of Medicine and Dentistry of New Jersey. Lisa spent some time working in Dermatology before deciding that Gastroenterology was her calling. She comes to us with over 15 years of GI experience in both the inpatient and outpatient setting. Prior to her medical career, she served our Country as an Officer in the Army. Lisa’s Gastroenterology interests are in Inflammatory Bowel Diseases, Crohns and Colitis, as well as research in those fields. Lisa’s other interests are running, hiking and spending time with family.
Julie V. Snead, APRN is a 1998 graduate of University of New Hampshire; she is a Board Certified by the American Academy of Nurse Practitioners and a member of the New Hampshire Nurse Practitioner Association. Julie’s Gastroenterology expertise includes GERD, Irritable bowel disease (IBD) and Irritable Bowel Syndrome (IBS). She comes to Elliot after having spent 5 years in Modesto, California as a GI APRN and 5 years with Dartmouth Hitchcock Gastroenterology. Julie’s kind and caring personality has awarded her high marks with patient satisfaction surveys. In her spare time she enjoys spending time with her husband and children.
Shannon Ward, APRN has been Board Certified by the American Nurses Credentialing Center since 2017. She earned her Master of Science Degree in Nursing at Walden University. Shannon began her career as an RN in inpatient endoscopy and also worked acute care inpatient services for many years. Shannon worked for the Department of Corrections as an APRN in Primary Care, before going back to her true passion, Gastroenterology. She joined CMC in 2018, working in both inpatient side as well as the outpatient Gastroenterology practice. Shannon’s clinical interests are liver diseases including Cirrhosis and Hepatitis C. She enjoys reading and baking and loves camping with her family.