Patient presents with complaints of right knee pain, consistent with symptoms of mucoid degeneration.  The patient reports intermittent aching and stiffness, occasionally exacerbated by activity.  On physical examination, there is palpable tenderness along the medial joint line and mild crepitus with range of motion.  No significant effusion or warmth is noted.  The patient denies any history of trauma or locking of the joint.  McMurray's test is negative.  Differential diagnosis includes osteoarthritis, meniscal tear, and patellofemoral pain syndrome.  Imaging studies, specifically a right knee MRI, were ordered to evaluate for internal derangement and confirm the diagnosis of mucoid degeneration, also known as cystic degeneration of the meniscus.  Preliminary assessment suggests a diagnosis of right knee mucoid degeneration.  Conservative management will be initiated, focusing on physical therapy for range of motion and strengthening exercises.  NSAIDs are prescribed for pain management.  The patient was educated on activity modification and the importance of adherence to the prescribed treatment plan.  Follow-up appointment scheduled in four weeks to assess response to treatment and discuss further management options if necessary, including potential viscosupplementation or corticosteroid injection.  ICD-10 code M23.211 will be used for right knee derangement, and CPT codes will be determined based on the specific physical therapy and injection procedures performed, if any.