Patient presents with complaints of right knee pain and instability consistent with a right knee sprain.  Onset of symptoms occurred on [Date of injury] after [Mechanism of injury, e.g., twisting the knee while playing basketball].  Patient denies any popping or audible click at the time of injury.  Pain is localized to the [Location of pain, e.g., medial aspect of the right knee] and is characterized as [Character of pain, e.g., sharp, aching].  Patient reports [Severity of pain, e.g., mild, moderate, severe] pain, aggravated by weight-bearing and ambulation.  Associated symptoms include [Associated symptoms, e.g., swelling, stiffness, bruising, limited range of motion].  Physical examination reveals [Objective findings, e.g., tenderness to palpation along the medial joint line, mild effusion, positive valgus stress test at [degrees] indicating a possible MCL sprain, negative anterior and posterior drawer tests].  Range of motion is limited in [Direction of limited ROM, e.g., flexion and extension].  Neurovascular examination is intact.  Differential diagnosis includes ligament sprain, meniscus tear, and patellar instability.  Impression is right knee sprain, likely involving the [Suspected ligament, e.g., MCL].  Plan includes RICE therapy (rest, ice, compression, elevation), NSAIDs for pain management, and referral to physical therapy for rehabilitation.  Patient advised to follow up in [Duration] for reevaluation.  ICD-10 code: [Appropriate ICD-10 code, e.g., S83.411A - Sprain of medial collateral ligament of right knee, initial encounter].  Medical necessity for treatment and diagnostic testing will be determined based on clinical findings and patient response to conservative management.