S82.156K Nondisplaced fracture of unspecified tibial tuberosity, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced fracture of unspecified tibial tuberosity, subsequent encounter for closed fracture with nonunion

Summary

A nondisplaced fracture of the tibial tuberosity involves a break in the bony prominence on the anterior tibia where the patellar tendon attaches, with no significant misalignment of the bone fragments. This injury is classified as a subsequent encounter for a closed fracture with nonunion, indicating the fracture site has not healed properly after initial treatment. The tibial tuberosity is critical for knee extension, and nonunion may result in persistent pain or functional limitations.

Causes

Traumatic injury is the primary cause, such as direct impact to the knee, falls, or sudden forceful contraction of the quadriceps muscle. Nonunion may occur due to inadequate immobilization, poor blood supply to the fracture site, or excessive stress on the healing bone. Sports-related incidents, particularly in adolescents, are common triggers for the initial fracture.

Risk Factors

• Participation in high-impact sports (e.g., basketball, soccer)
• Adolescent growth spurts with rapid bone growth
• Previous knee injuries or tendon abnormalities
• Activities involving sudden stops or jumps
• Delayed or inadequate initial fracture management

Symptoms

• Persistent localized pain and swelling over the tibial tuberosity
• Difficulty extending the knee or bearing weight
• Bruising or tenderness on palpation
• Mild functional limitation without visible deformity
• Possible clicking or grinding sensation during movement

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion, followed by imaging studies. X-rays or CT scans confirm the fracture and evaluate for nonunion, which is defined as a lack of healing progress over time. Additional tests may assess blood flow or soft tissue involvement if needed.

Treatment Options

Treatment focuses on promoting fracture healing and may include immobilization with a brace or cast, activity modification, and physical therapy to restore strength and function. Surgical intervention, such as bone grafting or internal fixation, may be considered for persistent nonunion. Pain management and anti-inflammatory medications are often used to alleviate symptoms.

Prognosis and Follow-Up

Prognosis depends on the severity of nonunion and response to treatment. Most patients achieve healing with appropriate management, but recovery may take several months. Regular follow-up with imaging is necessary to monitor progress. Long-term outcomes are generally favorable with proper care, though some may experience residual stiffness or weakness.

Complications

• Persistent pain or functional impairment
• Delayed union or chronic nonunion
• Increased risk of future fractures
• Knee instability or altered gait
• Potential need for surgical intervention

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use proper protective equipment during sports
• Gradually resume activity with guidance from a physical therapist
• Maintain bone health through adequate nutrition and exercise
• Follow post-treatment recommendations to support healing

When to Seek Professional Help

Seek medical attention if pain worsens, swelling increases, or mobility declines. Prompt evaluation is necessary if new symptoms, such as numbness or discoloration, develop. Follow-up with a specialist is recommended if nonunion is suspected or if initial treatment fails to improve symptoms.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Include details on the fracture's status, treatment provided, and any imaging results confirming nonunion. Ensure the record reflects the absence of displacement and the closed nature of the fracture to support accurate coding.