In this video Philipp Streubel, M.D., of the UNMC College of Medicine, explains when to consider Tennis Elbow surgery. See also: Tennis Elbow Surgery: When Is It Time? - (Five Key Points)
Dr Streubel reveals that Tennis Elbow is one of the most common conditions he sees affecting the elbow, and that in 90% of the cases it resolves on it's own - However...
"If no improvement is noted after six months of careful non-operative treatment that's when you could consider surgery and that there are several types of surgery available including open surgery and minimally-invasive surgery."
See this post and video for more about minimally-invasive surgery
And this post and video for more about the standard, open surgery for Tennis Elbow.