S49.029K Salter-Harris Type II physeal fracture of upper end of humerus, unspecified arm, subsequent encounter for fracture with nonunion

Name of the Condition

• Salter-Harris Type II physeal fracture of upper end of humerus, unspecified arm, subsequent encounter for fracture with nonunion (ICD-10 Code: S49.029K)

Summary

This code describes a Salter-Harris Type II 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 occurs when the growth plate and a portion of the metaphysis (the area adjacent to the growth plate) separate from the rest of the bone, typically in children and adolescents due to the relative weakness of the physis during development. The encounter is classified as subsequent for a fracture with nonunion, indicating a follow-up visit after initial treatment where the fracture has failed to heal properly.

Causes

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

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 sensation 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 its location at the growth plate. 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 nonunion.

Treatment Options

Treatment may include surgical intervention, such as internal fixation, to stabilize the fracture and promote healing. Non-surgical options, like prolonged immobilization or bone grafting, may be considered depending on the severity. Physical therapy is often recommended to restore function and strength.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Follow-up care is essential to monitor healing and adjust treatment as needed. Long-term outcomes may include residual stiffness or deformity if healing is incomplete.

Complications

• Chronic pain
• Limited arm function
• Growth disturbances
• Avascular necrosis (loss of blood supply to the bone)
• Need for additional surgery

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use proper protective equipment during sports
• Follow rehabilitation guidelines to restore strength and mobility
• Maintain regular follow-up appointments to monitor healing

When to Seek Professional Help

Seek immediate medical attention if experiencing severe pain, swelling, or deformity after an injury. Contact a healthcare provider if symptoms worsen or do not improve with treatment, or if there are signs of infection (e.g., fever, redness, drainage).

Tips for Medical Coders

This code is specific to a subsequent encounter for a Salter-Harris Type II physeal fracture of the upper humerus with nonunion. Documentation should clearly indicate the fracture type, location, arm (unspecified), and the presence of nonunion. Ensure the encounter is classified as "subsequent" and that the fracture status (nonunion) is well-documented to support accurate coding.