• Office Number


  • Fax Number


  • Hours

    Monday – Wednesday | 8AM-5PM

    Thursday | 7AM-3PM

    Friday – Closed

John M. Guenst, M.D.

Dr. Guenst has been with St. Thomas Medical Group since 1995. His undergraduate degree in Biology was earned at Clarkson College in New York in 1989 and his medical degree was received at Vanderbilt University. His residency in Anesthesia was performed at St. Louis University in Missouri in 1991 and his residency in Internal Medicine at the University of Tennessee in 1994.

Dr. Guenst is a trained pilot and served the Tennessee Air National Guard and US Air Force Reserves from 1988 to 2008. He is a licensed ATP (airline transport pilot) and certified flight instructor.

His additional medical interests preventative medicine and geriatrics.

In his free time, Dr. Guenst enjoys time with his wife of 19 years and his children. He also enjoys hiking, cycling, running and gardening.

Dr. Guenst is accepting new patients.

Click link below to make an appointment: if you need to be seen sooner than the listed available appointments, please call the office and we will do our best to accommodate you.

Enter the campus from WEST END AVE and proceed past the Emergency Room, Admitting and the Heart Institute Parking. Enter the garage on the right, which reads “Parking for Doctor’s Appointments.” This garage is located under the Medical Plaza Building. If you need special help, proceed to the blue level of the garage. Wheelchairs are available. Proceed to plaza elevators, go to the 4th floor and follow signs to Suite 400.  Additional parking is located in the Harding Garage with a cross walk on the 3rd level.