Terrace Pediatric Group Practice Overview Terrace Pediatric Group was founded over 50 years ago by Dr. Leonard J. Koenig and was located at 2005 Terrace Place, Nashville, TN 37203. At the time of Dr. Koenig's retirement in June of 1994, the office relocated to 216 22 nd Avenue North, Nashville, TN 37203 and the name was changed to Terrace ....