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Colorectal,
Gastrointestinal and Liver Care
Michigan Gastroenterology Institute and Capitol Colorectal Surgery
How Can We Help?
Who is DHI? 
Digestive Health Institute, also known as Michigan Gastroenterology Institute and Capitol Colorectal Surgery was established in 1998 in central Michigan with the goal of providing exceptional care to patients with digestive health diseases. We strive to give the best comprehensive care to our community in a way that conveys compassion and understanding, and we’ll never compromise the quality of care our patients receive.
Our care providers are simultaneously involved in clinical research and medical education with our higher-education affiliate, Michigan State University. We’re also a proud partner of Pinnacle GI Partners, a unique family of practices focused on innovating gastrointestinal health care practices across the Midwest. Thanks to our partnership, we can give our patients the best providers possible for effective treatment and compassionate care.
Conditions We Treat
Welcome DHI’s New Providers
Daniel P. Geisler, M.D., Colorectal Surgeon
Colorectal Surgeon Daniel Geisler, M.D. specializes in minimally invasive colorectal surgery. He has held positions at Columbia University and Cleveland Clinic.
Jannel Lee-Allen, M.D, Gastroenterologist
Gastroenterologist Jannel Lee-Allen, M.D. previously enjoyed a seven-year career in community and housing development in Detroit until she decided to pursue her passion in medicine.
Grace Langholz, MSPAS, PA-C, Physician Assistant
Physician Assistant Grace Langholz, MSPAS, PA-C is a Lansing native. She is bilingual and holds certifications in advanced cardio life support and basic life support.
Our Doctors
We’re proud of our team here at Digestive Health Institute. Our health care providers include some of the very best colorectal surgeons, gastroenterologists and physician assistants. To learn more about our qualified team of specialists, click their image or visit our providers page.
What Our Patients Are Saying
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