S79.199A Other physeal fracture of lower end of unspecified femur, initial encounter for closed fracture

Name of the Condition

Other physeal fracture of lower end of unspecified femur, initial encounter for closed fracture

Summary

An other physeal fracture of the lower end of the unspecified femur is an injury involving the growth plate (physis) at the distal femur, typically occurring in children or adolescents. This fracture disrupts the physis, which is the area of developing bone responsible for longitudinal growth. The term "other" indicates the fracture does not fit into more specific categories (e.g., Salter-Harris types) or involves additional details not captured by standard classifications. The "initial encounter for closed fracture" specifies this is the first treatment for a fracture where the skin remains intact.

Causes

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 from the adjacent bone. 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 prior injuries may predispose individuals to such fractures.

Symptoms

• Pain and swelling around the knee or thigh
• Difficulty bearing weight or moving the leg
• Visible deformity or misalignment of the limb
• Limited range of motion in the affected joint
• Tenderness to touch at the fracture site

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and deformity. Imaging studies, such as X-rays, are used to confirm the fracture and evaluate its extent. In some cases, additional imaging (e.g., MRI or CT) may be required to assess the growth plate and surrounding structures. The documentation must specify the fracture is closed and this is the initial encounter.

Treatment Options

Treatment depends on the severity and displacement of the fracture. Non-displaced fractures may be managed with immobilization (e.g., casting or bracing) and activity modification. Displaced fractures often require reduction (realignment) and stabilization, which may involve surgical intervention. Pain management and physical therapy are common adjuncts during recovery.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, though outcomes depend on the fracture type and alignment. Regular follow-up appointments are necessary to monitor healing and assess for potential growth disturbances. Long-term monitoring may be required to ensure normal bone development.

Complications

• Growth plate damage leading to limb length discrepancy or angular deformity
• Nonunion or malunion of the fracture
• Joint stiffness or reduced range of motion
• Chronic pain or arthritis in the affected joint
• Nerve or vascular injury (rare)

Lifestyle & Prevention

• Use protective gear during high-risk 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 growing bones
• Supervise children during activities with fall risks

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, inability to move the leg, visible deformity, or signs of infection (e.g., fever, redness, swelling). Follow up with a healthcare provider if pain persists, swelling worsens, or mobility does not improve with initial treatment.

Tips for Medical Coders

Document the encounter as the initial treatment for a closed fracture. Specify the location as the lower end of the femur and note the fracture involves the growth plate (physis) without fitting into more specific categories. Ensure the term "unspecified" is used when the femur side is not documented, and confirm the fracture is closed (skin intact) to align with the code.