S49.112 Salter-Harris Type I physeal fracture of lower end of humerus, left arm

Name of the Condition

• Salter-Harris Type I physeal fracture of lower end of humerus, left arm (ICD-10 Code: S49.112)

Summary

This code describes a Salter-Harris Type I fracture, which involves a complete separation of the growth plate (physeal) at the lower end of the left humerus. These fractures are common in children and adolescents due to the relative weakness of the growth plate compared to surrounding bone. The injury typically occurs at the distal humeral physis, affecting the area where the upper arm bone 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 gymnastics or contact sports, are frequent mechanisms. The force applied to the elbow can disrupt the growth plate without necessarily fracturing the adjacent bone.

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

Symptoms

• 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 relies on a physical examination to assess pain, swelling, and range of motion, combined with imaging studies like X-rays to visualize the fracture and confirm its location at the growth plate. A detailed patient history, including the mechanism of injury, is also important for accurate assessment.

Treatment Options

Treatment typically involves immobilization with a cast or splint to allow the growth plate to heal. In some cases, surgical intervention may be necessary if the fracture is displaced or unstable. Pain management and physical therapy may be recommended to restore function and strength.

Prognosis and Follow-Up

Most Salter-Harris Type I fractures heal well with proper treatment, especially when diagnosed early. Follow-up care is essential to monitor for complications, such as growth disturbances or joint stiffness. Regular check-ups with a healthcare provider ensure appropriate healing and recovery.

Complications

Potential complications include growth plate damage leading to limb length discrepancies, joint deformity, or chronic pain. In rare cases, infection or nonunion of the fracture may occur, requiring additional intervention.

Lifestyle & Prevention

Preventive measures include using protective gear during sports, avoiding high-risk activities, and ensuring proper technique to reduce injury risk. Maintaining bone health through a balanced diet and regular exercise can also support overall skeletal strength.

When to Seek Professional Help

Seek medical attention if there is severe pain, swelling, or inability to move the arm, or if a deformity is visible. Prompt evaluation is crucial to prevent long-term complications and ensure proper treatment.

Tips for Medical Coders

When coding S49.112, ensure the documentation specifies the left arm and confirms a Salter-Harris Type I physeal fracture of the lower humerus. Verify that the injury is classified as closed (unless otherwise documented) and note the encounter type (e.g., initial, subsequent) for accuracy. Accurate documentation of the mechanism of injury and clinical findings supports correct code assignment.