Right knee pain (ICD-10-CM code M23.09) is a common complaint, often resulting from various underlying conditions. The knee joint, comprising the femur, tibia, and patella, endures significant weight-bearing and movement, making it susceptible to injuries and degenerative changes. Common causes of right knee pain include osteoarthritis, ligament sprains (such as anterior cruciate ligament or medial collateral ligament injuries), meniscus tears, and patellofemoral pain syndrome. Diagnosis involves a physical examination, medical history review, and imaging tests (e.g., X-rays, MRI). Treatment options range from conservative measures like rest, ice, and physical therapy to surgical interventions in severe cases.