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Despite lack of evidence of effectiveness, use of hyaluronic acid injections for knee osteoarthritis continues to increase. In their 2013 clinical practice guidelines, the American Academy of Orthopaedic Surgeons recommended against the use of hyaluronic acid in knee osteoarthritis management. Yet, a recent analysis of procedures and services provided under Medicare Part B from 2012 to 2018, published online on December 13, 2021, in the Journal of Bone and Joint Surgery, found no decrease in the use of hyaluronic acid injection among orthopedic surgeons and a significant increase in its use among physician assistants (111,886 to 194,387 procedures) and NPs (10,174 to 68,669 procedures). Rheumatologists were the only group showing decreased use (89,345 to 69,191). The surgical academy's updated 2021 clinical practice guidelines also recommend against hyaluronic acid injections for treatment of knee osteoarthritis. More needs to be done to ensure that clinicians who manage patients with knee osteoarthritis have current knowledge and adhere to best practice guidelines.