Patient presents with complaints of right knee pain consistent with a right knee strain. Onset of pain occurred [Date of onset] while [Mechanism of injury - e.g., running, twisting, playing sports].  Patient denies any popping or clicking sounds at the time of injury.  Pain is localized to the [Location of pain - e.g., medial aspect, lateral aspect, posterior knee] and described as [Character of pain - e.g., sharp, dull, aching].  Patient reports [Severity of pain - e.g., mild, moderate, severe] pain, aggravated by [Aggravating factors - e.g., weight-bearing, bending, straightening] and alleviated by [Alleviating factors - e.g., rest, ice, elevation].  Physical examination reveals [Objective findings - e.g., tenderness to palpation, mild swelling, full range of motion with pain at end range, negative McMurray test].  No signs of effusion or instability are noted.  Diagnosis of right knee strain is made based on clinical presentation and physical examination findings.  Differential diagnoses considered include meniscus tear, ligament sprain, and patellofemoral pain syndrome.  Treatment plan includes RICE therapy (rest, ice, compression, elevation), NSAIDs for pain management, and physical therapy for strengthening and range of motion exercises.  Patient advised to avoid strenuous activities and weight-bearing as tolerated.  Follow-up appointment scheduled in [Duration - e.g., one week, two weeks] to assess progress and adjust treatment plan as needed.  ICD-10 code S13.411A, Right knee strain.