The objective of the North American Spine Society (NASS) Clinical Guideline for the Diagnosis and Treatment of Low Back Pain is to provide evidence-based recommendations to address key clinical questions surrounding the diagnosis and treatment of adult patients with nonspecific low back pain. This guideline is based upon a systematic review of the evidence and reflects contemporary treatment concepts for low back pain as reflected in the highest quality clinical literature available on this subject as of February 2016. The goals of the guideline recommendations are to assist in delivering optimum, efficacious treatment and functional recovery from nonspecific low back pain.