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Our multi-specialty team

Our program leaders and multi-disciplinary team are committed to providing fellows with advanced education, clinical training and surgical experiences necessary for the comprehensive management of the bariatric patient. You’ll work directly alongside bariatric surgeons, a medical bariatrician, physician assistants, registered dietitians, clinical psychologists, program managers and clinical coordinators.

Fellowship leaders


Brandon T. Grover, DO, FACS, FASMBS 

Director, Advanced GI MIS/Bariatric Surgery Fellowship

Dr. Grover is a board-certified general surgeon with Focused Practice Distinction in Metabolic and Bariatric Surgery. He is the fellowship director of the Advanced GI MIS/Bariatric Surgery program at Gundersen Health System.  

Dr. Grover graduated from the University of Health Sciences – COM (now known as KCU), in Kansas City, Mo. He completed a surgery residency at Wright State University/Wright Patterson Air Force Base, in Dayton, Ohio. He spent 9 years active-duty Air Force to include 5 years during residency and 4 years as a staff general surgeon. He first came to Gundersen as the MIS/Bariatric Fellow, then later rejoined the program as faculty, after completing his military commitment.  

Dr. Grover’s interests include metabolic and bariatric surgery, foregut surgery and robotic hernia repairs. At home, he enjoys spending time with his family. His 4 children are rapidly growing up, with both of his daughters now away at college. He enjoys outdoor activities, but not in the extremes of weather. He is very good at being a terrible golfer but is trying to improve. 


Joshua Pfeiffer, MD, FACS, FASMBS 

Associate program director, Advanced GI MIS/Bariatric Surgery Fellowship

Katelyn Mellion, MD 

Faculty, Advanced GI MIS/Bariatric Surgery Fellowship

Kathy Thoen

Fellowship program administrator 


Why Gundersen

Aerial view of la crosse, wisconsin.

Call La Crosse Home

We have it all in La Crosse, Wis. Our vibrant city and region support your dream lifestyle with a welcoming community, culture and outdoor adventure.

Explore La Crosse
Single family home near Gundersen's campus.


Steps from our flagship medical center in La Crosse, our housing options allow you to enjoy the company of your family and the comradery of your colleagues.

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Residents kayaking the Kickapoo river.

Prioritizing Your Wellness

As you learn how to become the clinician you aspire to be, we’ll provide space to prioritize your mind and body wellness, and reach the work-life balance you need.

Wellness opportunities
Contact our team

We are here to answer your questions. 

Email us

1900 South Ave.
La Crosse, WI 54601

(608) 782-7300

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