Patient presents with complaints of right knee pain and instability following a non-contact twisting injury sustained while playing basketball.  The patient reports hearing a "pop" at the time of injury, followed by immediate swelling and difficulty bearing weight.  Physical examination reveals tenderness along the joint line, positive Lachman test, positive anterior drawer test, and positive pivot shift test, suggestive of an anterior cruciate ligament (ACL) tear.  McMurray's test was negative, ruling out meniscus tear.  Range of motion is limited due to pain and swelling.  An MRI of the right knee is ordered to confirm the diagnosis and evaluate for associated injuries such as meniscus or MCL damage.  Differential diagnosis includes ACL sprain, meniscus tear, MCL sprain, patellar dislocation, and bone fracture.  Preliminary diagnosis is right knee ACL tear.  Treatment plan includes RICE (rest, ice, compression, elevation), pain management with NSAIDs, referral to orthopedics for further evaluation and consideration for ACL reconstruction surgery, and physical therapy for rehabilitation.  ICD-10 code S73.511A will be used for right knee ACL tear, and CPT codes for the MRI and orthopedic consultation will be determined upon completion of those services.  Patient education provided on ACL injury, recovery process, and the risks and benefits of surgical versus non-surgical management.  Follow-up appointment scheduled in one week to review MRI results and discuss treatment options.