S49.022K Salter-Harris Type II physeal fracture of upper end of humerus, left arm, subsequent encounter for fracture with nonunion

Name of the Condition

• Salter-Harris Type II physeal fracture of upper end of humerus, left arm, subsequent encounter for fracture with nonunion (ICD-10 Code: S49.022K)

Summary

This code describes a Salter-Harris Type II fracture involving the growth plate (physeal) at the upper end of the left humerus, where the fracture has failed to heal (nonunion) and the patient is receiving follow-up care. This type of fracture occurs when the growth plate and a portion of the metaphysis separate from the rest of the bone, typically in children and adolescents due to the relative weakness of the physis during development. The "subsequent encounter" indicates ongoing management after the initial injury, and "nonunion" specifies that the fracture has not healed as expected.

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 initial treatment, poor blood supply to the fracture site, or excessive movement before healing.

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 or immobilization

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 at the fracture site

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 (e.g., CT or MRI) may be used to evaluate healing status and bone alignment.

Treatment Options

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

• Prolonged immobilization with a cast or brace
• Surgical intervention (e.g., bone grafting, internal fixation) to stabilize the fracture
• Physical therapy to improve range of motion and strength
• Monitoring for complications or further intervention if healing does not progress

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. With appropriate management, many patients achieve functional recovery, though some may experience long-term limitations in arm movement or strength. Regular follow-up with imaging is typically required to assess healing progress and adjust treatment as needed.

Complications

• Chronic pain or discomfort
• Limited range of motion or stiffness
• Growth disturbances (e.g., limb length discrepancy)
• 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
• Follow prescribed immobilization and activity restrictions
• Engage in physical therapy as recommended to restore function
• Use protective gear during sports to reduce injury risk

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, warmth, fever)
• New or worsening numbness or tingling in the arm

Tips for Medical Coders

This code is specific to a subsequent encounter for a Salter-Harris Type II physeal fracture of the left humerus with nonunion. Documentation should clearly indicate the fracture type, location, laterality, and the presence of nonunion. The "subsequent encounter" modifier (K) applies when the patient is receiving active treatment for the fracture after the initial phase of healing. Ensure the medical record supports the nonunion diagnosis and the ongoing nature of the encounter to justify code assignment.