S79.132D Salter-Harris Type III physeal fracture of lower end of left femur, subsequent encounter for fracture with routine healing

Name of the Condition

Salter-Harris Type III physeal fracture of lower end of left femur, subsequent encounter for fracture with routine healing

Summary

A Salter-Harris Type III physeal fracture of the lower end of the left femur is an injury involving the growth plate (physis) at the distal femur, typically occurring in children or adolescents. This fracture disrupts the physis and extends through the epiphysis, as defined by the Salter-Harris classification system. The injury involves a fracture line that passes through the growth plate and into the epiphyseal bone, potentially affecting joint stability and future growth. The term "subsequent encounter" indicates this is a follow-up visit for the fracture, and "routine healing" means the fracture is progressing normally without complications.

Causes

Salter-Harris Type III physeal fractures of the lower femur are usually caused by acute trauma, such as falls, sports-related injuries, or direct blows to the knee or thigh. The force transmitted across the growth plate can cause it to separate and extend into the epiphysis. In some cases, repetitive stress or overuse may contribute to the injury, particularly in active children or adolescents.

Risk Factors

• Age: Most common in children and adolescents, as growth plates are weaker than surrounding bone.
• Activity level: Participation in high-impact sports or activities with a risk of falls (e.g., gymnastics, soccer, skateboarding).
• Growth spurts: Periods of rapid growth may temporarily weaken the physis, increasing susceptibility to injury.
• Anatomical factors: Variations in bone structure or alignment may predispose to injury.

Symptoms

• Pain localized to the knee or thigh, often worsening with movement.
• Swelling and tenderness around the affected area.
• Limited range of motion in the knee joint.
• Visible deformity or misalignment in severe cases.
• Difficulty bearing weight on the left leg.

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays, are used to confirm the fracture type and assess alignment. In some cases, advanced imaging like MRI or CT scans may be ordered to evaluate the extent of the injury or associated soft tissue damage. The "subsequent encounter" status is determined by the timing of the visit relative to the initial injury and the healing progress.

Treatment Options

Treatment depends on the severity of the fracture and displacement. Nonsurgical options include immobilization with a cast or brace to allow healing. Surgical intervention may be necessary for displaced fractures to realign the bone and stabilize the joint. Physical therapy is often recommended during recovery to restore strength and mobility. Follow-up imaging may be used to monitor healing progress.

Prognosis and Follow-Up

With proper treatment, most Salter-Harris Type III fractures heal without long-term complications. Routine healing indicates the fracture is progressing as expected. Follow-up visits are important to assess healing, adjust treatment, and monitor for potential growth disturbances. Long-term outcomes depend on the accuracy of reduction and the extent of initial injury.

Complications

• Growth disturbances: Potential for uneven limb length or angular deformity if the growth plate is damaged.
• Joint stiffness or arthritis: Due to injury to the articular surface or prolonged immobilization.
• Nonunion or malunion: Incomplete or improper healing of the fracture.
• Infection: Rare but possible with surgical intervention.

Lifestyle & Prevention

• Use protective gear during high-impact activities (e.g., helmets, pads).
• Ensure proper warm-up and technique in sports to reduce injury risk.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Avoid overuse or repetitive stress on the knee and thigh.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, inability to bear weight, visible deformity, or signs of infection (e.g., fever, redness, drainage). Follow up with a healthcare provider if symptoms worsen or do not improve with treatment, or if there is concern about healing progress.

Tips for Medical Coders

Document the laterality (left femur) and the encounter type (subsequent) clearly. Confirm that the fracture is healing routinely, as this impacts code assignment. Ensure documentation supports the Salter-Harris Type III classification and the absence of complications or delayed healing.