Thomas L. Maddin, M.D., was an eminent and venerable Nashville physician who taught at the University of Nashville and Shelby Medical College throughout the second half of the nineteenth century, instructing in the fields of anatomy, surgery, and nervous diseases. He received his medical degree from Lagrange College in 1845.

At the time of the fall of Fort Donelson during the Civil War, Maddin had charge of a large Confederate hospital in Nashville, and when the Union army captured the city, they decided to keep Maddin in charge of the wounded soldiers on account of his skillful management of the hospitals. Maddin's surgical practice was extensive, and he performed several operations that were noteworthy and attracted great attention at the time. Some of his operations were pronounced surgical truimphs by his colleagues.

In 1903, the Nashville medical community honored Maddin for his semi-centennial medical service to the city. He retired from teaching in 1905 and passed away in 1908.