S89.039K Salter-Harris Type III physeal fracture of upper end of unspecified tibia, subsequent encounter for fracture with nonunion

Name of the Condition

• Salter-Harris Type III physeal fracture of upper end of unspecified tibia, subsequent encounter for fracture with nonunion

Summary

A Salter-Harris Type III physeal fracture of the upper end of the unspecified tibia, subsequent encounter for fracture with nonunion, is a growth plate injury affecting the proximal tibia. This fracture involves a break through the growth plate (physis) that extends into the epiphysis, disrupting bone development. The "subsequent encounter" indicates follow-up care after the initial injury, and "nonunion" signifies that the fracture has failed to heal properly.

Causes

Common causes include trauma from falls, sports injuries, or accidents where force is applied to the knee or lower leg. Direct impact, twisting motions, or axial loading can disrupt the growth plate, leading to this type of fracture. Nonunion may result from inadequate initial treatment, poor blood supply, or excessive movement at the fracture site.

Risk Factors

• Age: More common in children and adolescents due to open growth plates.
• Activity Level: Participation in contact sports or activities with a risk of leg trauma.
• Anatomical Factors: Variations in bone structure or growth plate vulnerability.
• Treatment History: Prior inadequate immobilization or surgical intervention.

Symptoms

• Persistent pain and tenderness around the knee or proximal tibia.
• Swelling and possible bruising near the affected area.
• Difficulty or reluctance to bear weight on the affected leg.
• Limited range of motion in the knee.
• Visible deformity or instability in severe cases.

Diagnosis

Physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays, are typically used to confirm the fracture pattern and evaluate growth plate involvement. Additional imaging, like CT or MRI, may be used to assess nonunion or associated complications. Clinical history of prior injury and treatment is also considered.

Treatment Options

Treatment focuses on promoting fracture healing and may include surgical intervention, such as internal fixation, to stabilize the bone. Non-weight-bearing or restricted activity may be recommended. Physical therapy is often used to restore function and strength. In some cases, bone grafting or other procedures may be necessary to address nonunion.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Early intervention improves outcomes, but delayed healing or complications can occur. Regular follow-up with imaging and clinical assessments is necessary to monitor progress. Long-term monitoring for growth disturbances or arthritis may be required.

Complications

• Persistent pain or functional impairment.
• Growth plate damage leading to limb length discrepancy or angular deformity.
• Arthritis in the knee joint.
• Infection or other surgical complications.
• Chronic nonunion requiring additional interventions.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective equipment during sports or activities with leg trauma risk.
• Follow post-treatment guidelines for activity restrictions and rehabilitation.
• Maintain a healthy diet rich in calcium and vitamin D to support bone healing.

When to Seek Professional Help

Seek medical attention if persistent pain, swelling, or difficulty bearing weight occurs after an injury. Immediate care is needed for severe pain, visible deformity, or signs of infection, such as fever or increased redness.

Tips for Medical Coders

Document the encounter as a subsequent visit for fracture with nonunion. Include details on the fracture type (Salter-Harris III), location (upper end of unspecified tibia), and the presence of nonunion. Ensure clinical documentation supports the nonunion diagnosis and subsequent encounter timing.