S82.154Q Nondisplaced fracture of right tibial tuberosity, subsequent encounter for open fracture type I or II with malunion

Name of the Condition

• Nondisplaced fracture of right tibial tuberosity, subsequent encounter for open fracture type I or II with malunion

Summary

A nondisplaced fracture of the right tibial tuberosity involves a break in the bony prominence on the anterior upper tibia where the patellar tendon attaches, with no misalignment of bone fragments. This is a subsequent encounter for an open fracture type I or II, meaning the skin over the fracture site was compromised but the wound was limited, and malunion (healing in a non-anatomic position) has occurred. The tibial tuberosity is critical for knee extension, and malunion can impact function even without displacement.

Causes

Traumatic injury is the primary cause, such as direct impact to the knee, falls, or sudden forceful contraction of the quadriceps muscle. Sports-related incidents, motor vehicle accidents, or other high-impact events can lead to this fracture. Open fractures occur when the injury breaches the skin, exposing the fracture site, and malunion may result from incomplete healing or inadequate immobilization.

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
• Delayed or inadequate initial treatment

Symptoms

• Localized pain and swelling over the tibial tuberosity
• Difficulty extending the knee or bearing weight
• Visible wound or laceration at the fracture site (for open fractures)
• Bruising or tenderness on palpation
• Altered knee mechanics due to malunion

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 displacement, and assess for malunion. CT or MRI may be used to further evaluate bone healing and soft tissue involvement. The history of the initial injury and treatment is critical to determine the fracture type and encounter status.

Treatment Options

Treatment focuses on managing symptoms and addressing malunion. Options may include physical therapy to improve knee function, orthotic devices for support, and pain management. Surgical intervention may be considered for significant malunion affecting function. Wound care is necessary if the fracture site remains open or has residual scarring.

Prognosis and Follow-Up

Prognosis depends on the extent of malunion and functional impact. Most patients recover with conservative management, but residual stiffness or weakness may persist. Follow-up imaging and clinical evaluations are important to monitor healing and adjust treatment as needed. Long-term outcomes are generally favorable with appropriate care.

Complications

• Persistent pain or functional limitations due to malunion
• Reduced knee range of motion
• Increased risk of future knee injuries
• Chronic swelling or instability
• Potential need for surgical correction if malunion is severe

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use proper protective equipment during sports
• Engage in gradual, guided physical therapy to restore strength and mobility
• Maintain a healthy weight to reduce stress on the knee
• Follow post-injury rehabilitation protocols to minimize malunion risk

When to Seek Professional Help

Seek medical attention if you experience worsening pain, swelling, or difficulty bearing weight, or if you notice a change in knee function. Prompt evaluation is important if the fracture site shows signs of infection, such as increased redness, drainage, or fever.

Tips for Medical Coders

Document the fracture type (open I or II), encounter status (subsequent), and presence of malunion clearly. Include details on the initial injury, treatment history, and current clinical findings to support the code. Ensure alignment with clinical guidelines for open fracture classification and malunion documentation.