S49.11 Salter-Harris Type I physeal fracture of lower end of humerus

Name of the Condition

• Salter-Harris Type I physeal fracture of lower end of humerus (ICD-10 Code: S49.11)

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 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 is based on clinical evaluation and imaging. A physical examination assesses pain, swelling, and range of motion. X-rays are used to confirm the fracture and distinguish it from other injuries. In some cases, additional imaging (e.g., MRI) may be needed to evaluate soft tissue involvement or subtle fractures.

Treatment Options

• Immobilization: A cast or splint stabilizes the arm to promote healing.
• Closed reduction: Manual realignment of the growth plate may be performed if displaced.
• Surgical intervention: Required for unstable or severely displaced fractures to restore alignment.
• Follow-up care: Monitoring for growth disturbances or complications during recovery.

Prognosis and Follow-Up

Most Salter-Harris Type I fractures heal well with proper treatment. Long-term outcomes depend on the severity of the injury and adherence to treatment. Follow-up appointments assess healing, range of motion, and potential growth plate disturbances. Physical therapy may be recommended to restore function.

Complications

• Growth plate arrest or deformity
• Chronic pain or stiffness
• Limited range of motion
• Recurrent fractures
• Nerve or vascular injury (rare)

Lifestyle & Prevention

• Use protective gear during sports or high-risk activities.
• Avoid falls by maintaining balance and using proper techniques.
• Strengthen arm and shoulder muscles to support the elbow joint.
• Seek prompt medical attention for suspected injuries to prevent complications.

When to Seek Professional Help

Consult a healthcare provider if experiencing severe pain, swelling, or deformity after an injury. Immediate care is needed for signs of nerve or vascular compromise, such as numbness, discoloration, or inability to move the arm.

Tips for Medical Coders

Document the specific Salter-Harris Type I classification and confirm the fracture involves the lower end of the humerus. Ensure the medical record supports the diagnosis, including clinical findings and imaging results. Use this code only when the fracture is explicitly identified as Type I; other types require distinct codes.