EFFECTIVENESS: 3/5

Current research shows exercises and stretches are more effective than rest alone. Treatments like ultrasound do not have a great deal of research evidence but may be worth a try. Specific modalities and procedures such as Low Level Laser Therapy and Extra Corporeal Shock Wave Treatment are considered separately.
Most guidelines support physical therapy especially in the acute phase to assist patients in reducing pain, learning stretches and prevention strategies. Many chiropractors and physicians can provide these approaches as well.
Sources:
Coombes BK, Bisset L, Brooks P, Khan A, Vicenzino B. Effect of corticosteroid injection, physiotherapy, or both on clinical outcomes in patients with unilateral lateral epicondylalgia: a randomized controlled trial. JAMA. 2013 Feb 6;309(5):461-9. doi: 10.1001/jama.2013.129.
Overall, there are many different therapeutic approaches to Lateral Epicondyle Tendinopathy (LET) and no high-quality evidence definitively supports one approach over others.
Sources:
Kohia M1, Brackle J, Byrd K, Jennings A, Murray W, Wilfong E.Effectiveness of physical therapy treatments on lateral epicondylitis. J Sport Rehabil. 2008 May;17(2):119-36.