S83.121
Posterior subluxation of proximal end of tibia, right knee
Clinical Classification Guidelines
Medical Intelligence & Overview
Posterior subluxation of the proximal end of the tibia is a specific knee injury where the upper part of the shinbone (tibia) shifts slightly backward relative to the thigh bone (femur). This condition affects the stability and function of the right knee, often resulting from trauma or injury. Recognizing and understanding this injury can help those affected seek appropriate medical attention and care.
Causes & Symptoms
Clinical Causes: Trauma or direct blow to the front of the knee, such as during sports accidents or falls. Hyperextension injuries where the knee is forced beyond its normal straightening limit. Sudden twisting or pivoting movements during physical activities. Accidents involving vehicular impacts or falls from heights that exert force on the knee. Pre-existing ligament injuries that compromise knee stability, making the tibia more susceptible to subluxation.
Key Symptoms: Pain in the front or inside of the knee, especially after injury. Swelling around the knee joint. Feeling of instability or the knee giving way. Limited range of motion, difficulty fully bending or straightening the knee. A sensation of the tibia being misaligned or slipping backwards. Tenderness to touch around the knee joint.
Diagnostic & Treatment
Diagnosis Path: Diagnosing posterior subluxation of the tibia involves a thorough physical examination by a healthcare provider. The clinician will assess knee stability, swelling, and range of motion. Imaging studies are essential for confirming the injury and determining its extent. These include:
Treatment Protocols: Treatment options aim to restore normal knee alignment, reduce pain, and prevent further injury. The approach depends on the severity of the subluxation and associated injuries. Common treatments include:
Clinical Advice & FAQs
Billing Guidance
Is S83.121 a billable ICD-10 code?
Yes, S83.121 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report S83.121?
Clinical documentation must specify the nature of Posterior subluxation of proximal end of tibia, right knee and any associated comorbidities for accurate reporting.
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