S82.155Q Nondisplaced fracture of left tibial tuberosity, subsequent encounter for open fracture type I or II with malunion

Name of the Condition

• Nondisplaced fracture of left tibial tuberosity, subsequent encounter for open fracture type I or II 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 injury is classified as an open fracture type I or II (skin breach but limited wound) and has developed malunion (healing in a non-anatomic position). The tibial tuberosity is critical for knee extension, and malunion may affect function. Open fractures require careful management to prevent infection, and subsequent encounters focus on monitoring healing and addressing complications.

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. The open nature of the fracture indicates the skin was penetrated, often by the fractured bone or external force. Malunion occurs when the fracture heals in a misaligned position, potentially due to inadequate immobilization or poor blood supply.

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)
• 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
• Possible signs of infection (e.g., redness, drainage) if the open fracture persists

Diagnosis

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

Treatment Options

Treatment focuses on managing malunion and preventing infection. Options may include:

• Immobilization with a brace or cast to support healing
• Physical therapy to restore knee function and strength
• Pain management with medications
• Surgical intervention (e.g., osteotomy) if malunion significantly impairs function
• Antibiotics for open fractures to prevent infection

Prognosis and Follow-Up

Prognosis depends on the extent of malunion and functional impact. Most patients recover with conservative management, but malunion may lead to chronic pain or limited mobility. Follow-up visits monitor healing, functional recovery, and address complications. Long-term outcomes may include residual stiffness or weakness, requiring ongoing rehabilitation.

Complications

• Chronic pain or discomfort
• Limited knee extension or instability
• Increased risk of future fractures
• Infection (if the open fracture persists)
• Arthritis or degenerative changes due to malunion

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use proper protective gear during sports
• Maintain bone health with adequate nutrition (e.g., calcium, vitamin D)
• Follow rehabilitation protocols to optimize healing
• Seek prompt treatment for knee injuries to prevent malunion

When to Seek Professional Help

• Worsening pain, swelling, or redness
• Signs of infection (e.g., fever, drainage)
• Inability to bear weight or extend the knee
• New or worsening deformity
• Persistent functional limitations after treatment

Tips for Medical Coders

This code (S82.155Q) is used for a subsequent encounter of a nondisplaced left tibial tuberosity fracture with malunion, following an initial open fracture type I or II. Documentation must specify the fracture type (open I/II), malunion, and subsequent encounter status. Ensure the record includes details of the initial injury, healing progress, and current clinical status to support accurate coding.