S49.129G Salter-Harris Type II physeal fracture of lower end of humerus, unspecified arm, subsequent encounter for fracture with delayed healing

Name of the Condition

• Salter-Harris Type II physeal fracture of lower end of humerus, unspecified arm, subsequent encounter for fracture with delayed healing (ICD-10 Code: S49.129G)

Summary

This code describes a Salter-Harris Type II fracture involving the growth plate (physeal) at the lower end of the humerus, with a fragment of the metaphysis included. It is a subsequent encounter for a fracture with delayed healing, indicating the patient is receiving active treatment for a fracture that has not healed within the expected timeframe. This injury is common in children and adolescents due to the relative weakness of the growth plate compared to surrounding bone, typically affecting the distal humeral physis where the upper arm meets the elbow joint.

Causes

Trauma is the primary cause, often resulting from a fall onto an outstretched hand or a direct blow to the elbow. Sports-related injuries, such as those from contact sports or activities involving forceful arm movement, are frequent mechanisms. The force applied to the elbow can disrupt the growth plate and pull a small piece of the metaphysis with it.

Risk Factors

• Age (most common in children and adolescents with open growth plates)
• Participation in high-impact or contact sports
• Prior growth plate injuries or developmental abnormalities
• Activities involving repetitive stress on the elbow
• Poor nutrition or underlying medical conditions affecting bone healing

Symptoms

• Persistent pain and swelling localized to the elbow or lower arm
• Tenderness over the distal humeral growth plate
• Limited range of motion in the affected arm
• Possible visible deformity in severe cases
• Difficulty moving or bearing weight on the arm

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 healing progress. Delayed healing may be identified if the fracture line remains visible or if there is insufficient callus formation over time. Additional imaging, like CT or MRI, may be used to evaluate the extent of the injury or complications.

Treatment Options

Treatment focuses on promoting healing and may include immobilization with a cast or splint to stabilize the fracture. Surgical intervention, such as internal fixation, may be necessary for severe or displaced fractures. Physical therapy is often recommended to restore strength and mobility once healing progresses. Monitoring for delayed healing may involve regular follow-up imaging and adjustments to the treatment plan.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture and adherence to treatment. Most Salter-Harris Type II fractures heal well with appropriate care, but delayed healing requires closer monitoring. Follow-up appointments are essential to assess healing progress and adjust treatment as needed. Long-term outcomes are generally good, but complications like growth disturbances or joint stiffness may occur in severe cases.

Complications

• Delayed or incomplete healing (nonunion)
• Growth plate damage leading to limb length discrepancy
• Joint stiffness or reduced range of motion
• Chronic pain
• Infection (if surgical intervention is required)

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use protective gear during sports or activities with a risk of falls
• Maintain a balanced diet rich in calcium and vitamin D to support bone health
• Follow rehabilitation guidelines to restore strength and mobility

When to Seek Professional Help

Seek medical attention if there is increased pain, swelling, or deformity, or if the arm cannot be used normally. Prompt evaluation is necessary if healing does not progress as expected or if new symptoms develop.

Tips for Medical Coders

This code is used for a subsequent encounter for a Salter-Harris Type II physeal fracture of the lower humerus with delayed healing. Documentation should specify the fracture type, location (unspecified arm), and the presence of delayed healing. Ensure the encounter is classified as "subsequent" and that the fracture’s healing status is clearly documented to support the code assignment.