Biography Dr. Johnson opened his urology practice in Grayson County in 1996. He majored in biology at Baylor University where he received his bachelor's degree in 1986. He earned his M.D. degree at LSU School of Medicine in Shreveport in 1990.
The University of Texas Medical Branch in Galveston accepted Dr. Johnson into its urology residency program in June of 1990. He earned numerous local...