S49.141A Salter-Harris Type IV physeal fracture of lower end of humerus, right arm, initial encounter for closed fracture

Name of the Condition

• Salter-Harris Type IV physeal fracture of lower end of humerus, right arm, initial encounter for closed fracture (ICD-10 Code: S49.141A)

Summary

This code describes a Salter-Harris Type IV fracture involving the growth plate (physeal) at the lower end of the right humerus, with an initial encounter for a closed fracture. Type IV fractures extend through the metaphysis, physis, and epiphysis, potentially disrupting both growth and joint alignment. These injuries are uncommon but serious, as they may affect long-term bone development and joint function.

Causes

Trauma is the primary cause, typically resulting from a fall onto an outstretched hand, a direct blow to the elbow, or forceful arm movement. High-impact activities, such as sports or accidents, can generate the necessary force to cause this fracture type.

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 mobility, combined with imaging studies like X-rays to visualize the fracture and confirm its type and location. A detailed patient history, including the mechanism of injury, is also important to guide evaluation.

Treatment Options

• Immobilization: A cast or splint may be used to stabilize the arm during healing.
• Closed reduction: Manual realignment of the bone fragments without surgery, if appropriate.
• Surgical intervention: Often required for Type IV fractures to restore proper alignment and stabilize the joint, as these injuries involve multiple bone segments.
• Treatment aims to preserve growth potential and joint function.

Prognosis and Follow-Up

Prognosis depends on the accuracy of reduction and the extent of growth plate involvement. Close follow-up with imaging is necessary to monitor for growth disturbances or joint issues. Long-term outcomes may include normal function if treated promptly, but complications like growth arrest or arthritis are possible.

Complications

• Growth plate disturbance leading to limb length discrepancy or angular deformity
• Joint stiffness or arthritis
• Nonunion or malunion of the fracture
• Nerve or vascular injury (rare)

Lifestyle & Prevention

• Use protective gear during sports or high-risk activities.
• Ensure proper technique and supervision in activities involving the elbow.
• Maintain bone health through adequate nutrition and exercise.

When to Seek Professional Help

Seek immediate medical attention for severe pain, visible deformity, inability to move the arm, or signs of nerve/vascular compromise (e.g., numbness, discoloration).

Tips for Medical Coders

Document the fracture type (Salter-Harris IV), laterality (right arm), encounter type (initial), and fracture status (closed) to support accurate coding. Ensure clinical documentation specifies the anatomical involvement and absence of open wound or infection.