Dr. Hargroder’s Mini Gastric Bypass Support Team

Tonya Williams, Mini Gastric Bypass Support Team

Tonya Williams

Doctor-Patient Coordinator

Primary Duties:  Assist patients with preparation for their scheduled surgery date, assist Dr. Hargroder with day to day affairs in his surgical practice.


Tonya Williams is the person who will guide you each step of the way in completing the requirements needed by Dr. Hargroder. Tonya understands how important it is to help you accomplish any and all requirements in a timely fashion and will help you “stay on track” as you complete your check list leading up to the date of your procedure. When Tonya gives you the Green Light, you are ready to have your procedure and experience the life changing benefits of a successful MGB!

Carla Hubenthal, Mini Gastric Bypass Support Team

Carla Hubenthal

Patient Care Coordinator

Primary Duties: Initial contact with patients, assist potential patients by answering questions and providing emotional support as they explore the option of weight loss surgery.


Carla Hubenthal is our Patient Care Advocate and the person you are most likely to talk to during your MGB Journey. Carla’s life was dramatically changed almost a decade ago when she had her MGB done. Carla is the Founder of a personal and professional development company called Sleeping Giant Within. Her experience teaching and training people to maximize their own potential has made her the perfect choice to conduct our educational seminars and walk beside you through each phase of the MGB process.

Brian Nieves, Mini Gastric Bypass Support Team

Brian Nieves

Chief Operating Officer

Primary Duties:  Business Development, Community Outreach, Physician Liason


Brian is the newest member of Dr. Hargroder’s MGB Team. Brian has extensive experience in business development and community outreach. Aside from being a Business Development Specialist and our Chief Operating Officer, Brian has twenty years combined service in the U.S. Navy and our Missouri State Legislature. Brian & his wife Julie have three children, Alexandra, Moriah and Victor.

Learn more about David Hargroder, M.D.
Learn Everything You Need to Know about MGB Surgery!
Carla Hubenthal Before and After

Schedule Your FREE
15-Minute Intro Call with Carla

Carla is more than Dr. Hargroder's Patient Care Coordinator, she is an MGB patient and can speak from experience!
You will be taken to a scheduling page

Ready to Talk Now?

Give us your name and phone number, and we will call you ASAP - usually within 5 minutes!


Learn everything you need to know in the
"Winning the Weight-Loss Battle for Life" Video Series!
You will receive links to the video series via email
Learn Everything You Need to Know about MGB Surgery!
Dr. David Hargroder Mini Gastric Bypass Surgery