Patient presents with complaints of left ankle pain and swelling following a twisting injury sustained while playing basketball.  Onset of symptoms was acute, occurring immediately after the injury.  Patient reports hearing a popping sensation at the time of injury and is unable to bear weight on the affected extremity.  Physical examination reveals localized tenderness, edema, and ecchymosis over the lateral aspect of the left ankle and distal fibula.  Pain is exacerbated with palpation and attempted range of motion.  Neurovascular status distal to the injury is intact.  Radiographic imaging of the left ankle and fibula demonstrates a transverse fracture of the distal fibula, specifically a Weber B type fracture.  Differential diagnosis includes ankle sprain, ligamentous injury, and fibular stress fracture.  Assessment: Closed left fibula fracture, distal diaphysis.  Plan:  Immobilization with a short leg cast,  non-weight bearing status for six weeks,  follow-up radiographs in two weeks to assess fracture alignment and healing.  Patient education provided regarding cast care, pain management with ibuprofen, and signs of complications such as compartment syndrome.  Referral to orthopedics scheduled.  ICD-10 code S82.402A assigned for closed fracture of the distal fibula of left lower leg.