Gastroenterology Care in O'Fallon Expands with New Provider
June 08, 2026
HSHS Medical Group welcomes Angela Croessman-Marshall, MSN, AGPCNP-BC, to HSHS Medical Group Multispecialty Care - St. Elizabeth’s, at 3 St. Elizabeth’s Blvd., Suite 5000, in O’Fallon, Illinois. She provides comprehensive gastroenterology care for adults, evaluating and managing conditions such as gastroesophageal reflux disease, inflammatory bowel disease, liver disorders and irritable bowel syndrome.
Croessman-Marshall earned a Master of Science in nursing from Walden University and a Bachelor of Science in nursing from McKendree University. She is board certified as an adult gerontology primary care nurse practitioner through the American Association of Nurse Practitioners. Her clinical background includes extensive experience in critical care and cardiovascular services, strengthening her approach to complex and chronic medical concerns.
Croessman-Marshall focuses on thorough assessment, accurate diagnosis and individualized treatment planning. She values listening to patients, encouraging questions and involving them in decisions about their care. Her goal is to help adults better understand their digestive health and manage conditions that affect daily life.
To schedule an appointment with Croessman-Marshall, visit here or call 618-641-5803. New HSHS Medical Group patients may call the HSHS Medical Group Patient Advocate at 844-520-8897 to help set up their first appointment.
Croessman-Marshall earned a Master of Science in nursing from Walden University and a Bachelor of Science in nursing from McKendree University. She is board certified as an adult gerontology primary care nurse practitioner through the American Association of Nurse Practitioners. Her clinical background includes extensive experience in critical care and cardiovascular services, strengthening her approach to complex and chronic medical concerns.
Croessman-Marshall focuses on thorough assessment, accurate diagnosis and individualized treatment planning. She values listening to patients, encouraging questions and involving them in decisions about their care. Her goal is to help adults better understand their digestive health and manage conditions that affect daily life.
To schedule an appointment with Croessman-Marshall, visit here or call 618-641-5803. New HSHS Medical Group patients may call the HSHS Medical Group Patient Advocate at 844-520-8897 to help set up their first appointment.
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