Patient presents with complaints consistent with patellar tendon rupture.  Onset of injury occurred on [Date of injury] during [Mechanism of injury - e.g., athletic activity, fall].  Patient reports a sudden popping sensation in the knee followed by immediate pain and inability to bear weight.  Physical examination reveals [Specify location] tenderness, palpable defect superior to the patella, and an inability to actively extend the knee.  Passive knee flexion is present but painful.  Patellar apprehension is positive.  A positive Thompson test suggests a complete rupture.  Differential diagnosis includes patellar tendinopathy, quadriceps tendon rupture, and knee effusion.  Imaging studies including knee x-ray and potentially MRI are ordered to confirm the diagnosis and evaluate the extent of the tear.  Preliminary diagnosis of patellar tendon rupture is made based on clinical findings.  Treatment plan includes consultation with orthopedic surgery, potential surgical repair of the tendon, pain management with NSAIDs and or other analgesics as indicated, immobilization with a knee brace or splint, and physical therapy following surgical intervention.  ICD-10 code M26.57 and CPT codes 27540-27548 (depending on the surgical approach and complexity) are anticipated.  Patient education provided regarding post-operative care, rehabilitation, and expected recovery time.  Follow-up appointment scheduled with orthopedic surgery in [Number] days.  Risks and benefits of surgical and non-surgical treatment options were discussed, and the patient demonstrates understanding.  The patient's prognosis for regaining full function is [Prognosis - e.g., good, fair, guarded] pending surgical intervention and adherence to post-operative rehabilitation.