S49.049K Salter-Harris Type IV physeal fracture of upper end of humerus, unspecified arm, subsequent encounter for fracture with nonunion

Name of the Condition

• Salter-Harris Type IV physeal fracture of upper end of humerus, unspecified arm, subsequent encounter for fracture with nonunion (ICD-10 Code: S49.049K)

Summary

This code describes a Salter-Harris Type IV fracture involving the growth plate (physeal) at the upper end of the humerus, the bone of the upper arm, in an unspecified arm. This type of fracture extends through the metaphysis, physis, and epiphysis, often involving the joint. It is most common in children and adolescents due to the relative weakness of the growth plate during development. The "subsequent encounter for fracture with nonunion" specifies that this is a follow-up visit for a fracture that has not healed properly.

Causes

Trauma, such as a fall onto an outstretched hand or a direct blow to the shoulder, is the primary cause. These injuries may occur during sports, play, or accidents involving forceful arm movement. Nonunion can result from inadequate initial treatment, poor blood supply, or excessive movement at the fracture site.

Risk Factors

• Age (most common in children and adolescents with open growth plates)
• Participation in high-impact sports or activities
• Prior growth plate injuries
• Inadequate initial fracture management

Symptoms

• Persistent pain and swelling at the shoulder or upper arm
• Limited range of motion
• Visible deformity in severe cases
• Difficulty moving the arm
• Possible clicking or grinding sensations during movement

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 nonunion. A detailed patient history, including the mechanism of injury and prior treatment, is also important. Advanced imaging, such as CT or MRI, may be used to evaluate the extent of nonunion.

Treatment Options

Treatment focuses on promoting healing and restoring function. Options may include:

• Surgical intervention: Internal fixation with pins, screws, or plates to stabilize the fracture.
• Bone grafting: Using bone tissue to stimulate healing in cases of nonunion.
• Immobilization: A cast or brace to limit movement and support healing.
• Physical therapy: To restore strength and range of motion after healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Early intervention improves outcomes, but some cases may result in long-term functional limitations. Regular follow-up with imaging is necessary to monitor healing progress.

Complications

• Chronic pain
• Limited range of motion
• Growth disturbances (e.g., limb length discrepancy)
• Arthritis in the shoulder joint
• Need for additional surgery

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Follow post-treatment guidelines for immobilization and physical therapy.
• Use protective gear during sports to reduce injury risk.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe or worsening pain
• Increased swelling or deformity
• Inability to move the arm
• Signs of infection (e.g., redness, fever)

Tips for Medical Coders

This code is specific to a subsequent encounter for a Salter-Harris Type IV physeal fracture of the upper humerus with nonunion. Documentation must confirm the fracture type, location, arm (unspecified), and the presence of nonunion. Ensure the encounter is classified as "subsequent" and that nonunion is clearly documented to support code assignment.