Michael R Messmer, DO

Mei Huang, MD, PhD, is a board-certified gastroenterologist (GI) who sees patients 18 and older. She specializes in women’s GI health and treats conditions including acid reflux disease, swallowing problems, inflammatory bowel disease, irritable bowel syndrome, and Crohn's disease. She performs colonoscopies for colon cancer screenings, endoscopic ultrasounds, esophageal dilations, and small bowel enterostomies. Dr. Huang is committed to providing exceptional quality care and exceeding her patients’ expectations. She listens to their concerns, performs thorough evaluations, and works with her patients to create personalized treatment plans. This practice is part of BJC Medical Group of Illinois.

Jessica Therien, FNP, is a certified family nurse practitioner specializing in family medicine and treats patients 13 and older. She treats various health conditions and illnesses, including acute illnesses, migraines, sleep issues, allergies, asthma, thyroid disorders, obesity, diabetes, hypertension, high cholesterol, anxiety, and depression. She provides routine vaccinations, annual wellness and well-woman exams, and health screenings, promotes preventative care, and offers weight management counseling and treatment. This practice is part of BJC Medical Group of Illinois.