S82.155R Nondisplaced fracture of left tibial tuberosity, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Name of the Condition

• Nondisplaced fracture of left tibial tuberosity, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Summary

A nondisplaced fracture of the left tibial tuberosity involves a break in the bony prominence on the anterior upper tibia where the patellar tendon attaches, with the bone fragments remaining aligned. This code applies to a subsequent encounter for an open fracture classified as type IIIA, IIIB, or IIIC, indicating significant soft tissue damage and malunion (improper healing). Open fractures require careful management to address infection risk and healing complications, while malunion may affect knee function.

Causes

Traumatic injury is the primary cause, such as direct impact to the knee, falls, or sudden forceful contraction of the quadriceps muscle. The open nature of the fracture (types IIIA, IIIB, or IIIC) suggests severe soft tissue damage, often from high-energy trauma. Malunion may result from inadequate initial treatment, delayed healing, or biological factors affecting bone repair.

Risk Factors

• Participation in high-impact sports (e.g., basketball, soccer)
• Adolescent growth spurts, especially in athletes
• Previous knee injuries or surgeries
• Activities involving sudden stops or jumps
• Open wounds near the tibial tuberosity (increasing infection risk)
• Delayed or inadequate initial fracture management

Symptoms

• Localized pain and swelling over the tibial tuberosity
• Difficulty extending the knee or bearing weight
• Bruising or tenderness on palpation
• Visible or palpable deformity due to malunion
• Signs of infection (e.g., redness, drainage) in open fractures

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and functional limitations. Imaging studies, such as X-rays, are used to confirm the fracture, evaluate alignment, and identify malunion. CT or MRI may be ordered for complex cases to assess soft tissue damage or bone healing. Clinical evaluation of the open wound and infection risk is critical for classification.

Treatment Options

Treatment focuses on managing the open fracture and malunion. This may include surgical intervention to clean the wound, stabilize the fracture, or correct malunion. Antibiotics are often prescribed to prevent infection. Physical therapy is typically recommended to restore knee function and strength. Follow-up imaging monitors healing progress.

Prognosis and Follow-Up

Prognosis depends on the severity of the open fracture and malunion. Proper management can lead to functional recovery, though malunion may cause long-term knee stiffness or weakness. Regular follow-up appointments are necessary to assess healing, address complications, and adjust treatment. Physical therapy is often required to optimize outcomes.

Complications

• Infection (higher risk with open fractures)
• Delayed or nonunion of the fracture
• Chronic pain or knee instability
• Limited range of motion due to malunion
• Need for additional surgery to correct malunion

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use protective gear during sports to reduce injury risk
• Maintain bone health through proper nutrition and exercise
• Follow post-treatment guidelines to support healing
• Attend all follow-up appointments to monitor progress

When to Seek Professional Help

Seek immediate medical attention for severe pain, swelling, or inability to bear weight. Contact a healthcare provider if signs of infection (e.g., fever, redness, drainage) develop or if knee function does not improve with treatment.

Tips for Medical Coders

Document the fracture type (IIIA, IIIB, or IIIC) and malunion clearly. Specify the encounter as "subsequent" and note the open fracture details. Include clinical findings supporting malunion, such as imaging results or physical examination notes, to justify code assignment. Ensure alignment with ICD-10-CM coding guidelines for open fracture classification and malunion documentation.