210 Portland Street Columbia, MO 65201
573-777-8819

Physicians & Staff

Meet our committed caregivers

Here at GI Associates, we strive to provide the highest quality of care possible. As such we have chosen to have only licensed Registered Nurses support our patients and our Doctors. Our front desk and administrative service professionals are all highly trained and specialized in their respective field as well.
Dr. Bradley Anderson
Bradley W. Anderson
M.D.
Dr. Peter Jay Cleavinger
Peter Jay Cleavinger
M.D. / Ph.D.
Dr. Donald C. Gerhardt
Donald C. Gerhardt
M.D. / FACP / AGAF
Dr. Kevin D. Halsey
Kevin D. Halsey
M.D.
Dr. Nicolas Llorens
Nicolas Llorens
M.D.
Dr. Stephen Welsh
Stephen W. Welsh
M.D.
Dr. Michael D. Williams
Michael D. Williams
M.D.
Rita
Rita Lutz
Advanced Gerontological Nurse Practitioner
Jacob Pilger
Jacob Pilger
Administrator

Our Core Values

We treat each patient as a unique individual.

01.
Listen & Learn
02.
Evaluate
03.
Diagnose & Treat