This document provides a clinical practice guideline for managing otitis media with effusion (OME), which is fluid in the middle ear without signs of acute ear infection. It is an update of a 2004 guideline. Key changes include adding consumer advocates, incorporating new evidence from clinical practice guidelines and studies, emphasizing patient education and shared decision making, and new/expanded recommendations regarding diagnosis, management of chronic/at-risk cases, and assessing outcomes of OME resolution or improved hearing/quality of life. The guideline provides 11 action statements with strong or recommended approaches to diagnosing and managing OME in children ages 2 months to 12 years.