Our Providers

Meet Our Providers

GI North is comprised of a team of diverse providers dedicated to compassionate, individualized care for every patient, every time.

DR. SIMON COFRANCESCO

Board-Certified Gastroenterologist

Dr. Tyler An

Board-Certified Gastroenterologist

Jessica Calabro MSN, BSN, AGACNP-BC, RN, RNFA

Board-Certified Nurse Practitioner

Leah Reed MSN, APRN FNP-C

Board-Certified Nurse Practitioner

VALERIE AVALLONE, MSN, FNP-C

Board-Certified Nurse Practitioner

Caezairoa Jones

Board-Certified Nurse Practitioner

Dr. Simon Cofrancesco

Board-Certified Gastroenterologist

Dr. Cofrancesco founded GI North in Cumming, GA in the fall of 2011 starting out with 2 employees including his wife, Roxanna, in hopes of starting a successful private practice of his own. Since that time, he has added 5 additional providers, a state-of-the art endoscopy center, in house anesthesia, and a satellite clinic in Alpharetta. All combined, there are now over 50 employees that work at GI North. 

Dr. Cofrancesco graduated with honors from Kansas City University of Medicine and Bioscience, followed by his residency at Tufts University affiliate Bay State Medical Center in Springfield, MA. He went on to complete his Gastroenterology fellowship at the Long Island College Hospital in NYC. 

After completing his training, Dr. Cofrancesco went to an underserved area in Mississippi to repay his medical school loans, but stayed on for over 15 years after he met his wife, Roxanna Redden, and they started their family of 5 children.  Dr. Cofrancesco also served as Chief of Staff at the local hospital in 2014. 

Dr. Cofrancesco performs both basic and advanced endoscopic procedures in addition to the medical management of all forms of GI diseases. He remains board certified by the ABIM, and has almost 30 years of experience in Gastroenterology. 

His passions in life are his family, adventure in the form of travel, hiking, and diving, and of course, excellence in the care and service he and everyone at GI North provide to all of their patients.

Dr. Tyler An

Board-Certified Gastroenterologist

Tyler I. An, DO, was born in Seoul, South Korea, before moving to the U.S. at the age of 12. He lived in Orlando, Florida, until moving to Atlanta, Georgia, to attend college at Emory University. After graduating with a Bachelor of Science in biology, Dr. An worked at Yerkes Research Center for two years before attending the Philadelphia College of Osteopathic Medicine (Georgia campus) in Suwanee, Georgia. He completed his internal medicine residency at Michigan State University (MSU) in East Lansing, Michigan, where he received multiple awards, including Outstanding Junior Resident of the Year, Outstanding Senior Resident of the Year, and the Bernard H. Smookler Endowment Award. Dr. An then completed his gastroenterology fellowship at MSU-affiliated hospitals in Lansing, serving as a chief fellow during the last year of his fellowship.

Dr. An is board certified in internal medicine and gastroenterology. He is a member of the American College of Gastroenterology, American Gastroenterological Association, American Osteopathic Association, and American College of Osteopathic Internists. Dr. An has written and presented a number of academic papers, posters, and oral presentations at various local and national meetings. He was also a clinical instructor and a clinical assistant professor at MSU.

After the completion of his residency and fellowship training, Dr. An moved back to Georgia with his wife, Lydia, and two children, Tobias and Eliana. He is fluent in both English and Korean. Dr. An enjoys spending time with his family and friends and watching and playing sports such as basketball, football, soccer, and golf.

Degrees: Bachelor of Science in biology, Emory University; Philadelphia College of Osteopathic Medicine

Jessica Calabro, MSN, BSN, AGACNP-BC, RN, RNFA

Board-Certified Nurse Practitioner

Jessica Calabro was born and raised near Birmingham, Alabama, where she earned her nursing degree at the University of Alabama at Birmingham in 2007. Shortly after graduation, Jessica moved to Dawsonville, Georgia, and worked as a registered nurse for over 13 years in various specialties, including medical cardiology, endoscopy, and general surgery. In 2020, Jessica graduated from the University of Alabama at Birmingham with a master’s degree in advanced practice nursing with a registered nurse first assist subspecialty. She is board certified by the American Nurses Credentialing Center as an adult-gerontology acute care nurse practitioner. Jessica is a member of the Sigma Theta Tau International Honor Society of Nursing, American Association of Nurse Practitioners, and Association of periOperative Registered Nurses. In her free time, she enjoys spending time with her family and hiking in the North Georgia mountains.

Specialty: Certified Nurse Practitioner

Degrees: Bachelor of Science in nursing, University of Alabama at Birmingham; master’s degree in advanced practice nursing with a registered nurse first assist subspecialty, University of Alabama at Birmingham

Leah Reed MSN, APRN FNP-C

Board-Certified Nurse Practitioner

Leah Reed earned her Bachelor of Science in nursing at Augusta State University in 2015. Before completing her Master of Science in nursing at Georgia State University in 2019, she practiced as a registered nurse in a pediatric ICU, a post-anesthesia care unit, and an adult ICU. Leah also worked as a family nurse practitioner in a primary care setting prior to joining the GI North family in 2021. She is focused on disease prevention, the management of chronic conditions, and assisting patients in their health and wellness through every stage of life. Leah is a nationally board-certified nurse practitioner and a member of the United Advanced Practice Registered Nurses of Georgia’s Atlanta chapter. She is trained to assist doctors in assessment, diagnostics, and treatment for numerous gastroenterological conditions and is excited to be a part of the GI North team.

Leah is originally from a suburb of Atlanta, Georgia, and currently lives in the Alpharetta area. When not at work, she enjoys staying active by cycling, running, and hiking—anything that allows her to enjoy Georgia’s local nature. She also enjoys traveling to national parks and international travel. Leah spends most weekends doing these activities with her friends and family, who make everything more entertaining.

Degrees: Bachelor of Science in nursing, Augusta State University; Master of Science in nursing, Georgia State University

Valerie Avallone, MSN, FNP-C

Board-Certified Nurse Practitioner

Valerie Avallone was born and raised near Boston, MA. Following earning her first Bachelor’s degree in Human Development and Health Sciences she moved to the suburbs of Nashville, TN to earn her Bachelor’s Degree in Nursing at Union University in 2016. Following nursing school, she started her nursing career at Duke University Hospital in an adult ICU. After gaining experience she moved back to Boston, MA continuing to work as a registered nurse in an adult ICU. In 2021 she earned her Master’s in Nursing from Endicott College. She relocated to the suburbs of Atlanta with her significant other to be closer to his family. She joined the GI North family in January of 2022. In her free time she enjoys traveling, spending time with family and friends, reading, and cooking.

Degrees: Bachelors of Arts in Human Development and Health Sciences, Merrimack College; Bachelors of Science in Nursing, Union University; Masters of Science in Nursing, Endicott College

Caezairoa Jones

Board-Certified Nurse Practitioner

Caezairoa was born and raised in Lake Charles, LA, before moving to Baton Rouge, LA, where she earned her degree from LSU in Sociology and nursing from Our Lady of the University. CeeJ has worked as an RN since 2007 on multiple specialties, including medical-surgical, rehab, surgery-trauma, telemetry, postpartum, and home health. After almost a decade of providing nursing care, Caezairoa, wanting to advance her career and take a more active role in patient care, fueled her pursuit of an advanced practice degree. In 2017 she completed her Master’s of Nursing with honors from Walden University with a Family Medicine specialty. CeeJ is board certified by the American Academy of Nurse Practitioners. She is a member of Alpha Kappa Alpha Sorority Incorporated, American Academy of Nurse Practitioners, Association of Women’s Health, Obstetric and Neonatal Nurses, and Association of Diabetes Care & Education Specialist. During her career, CeeJ has distinguished herself multiple times as a committed and extraordinary patient care provider. She has been nominated for numerous awards, including two Daisy award nominations, an Atlanta Journal-Constitution Celebrating Nurses award, and a 2014 Daisy Award recipient for extraordinary nurses. Caezairoa enjoys spending time with her husband, two daughters, two fur babies, and cooking in her free time.