S49.091K Other physeal fracture of upper end of humerus, right arm, subsequent encounter for fracture with nonunion

Name of the Condition

• Other physeal fracture of upper end of humerus, right arm, subsequent encounter for fracture with nonunion (ICD-10 Code: S49.091K)

Summary

This code describes a fracture involving the growth plate (physeal) at the upper end of the right humerus, where the fracture has failed to heal (nonunion) and is documented as a subsequent encounter. Physeal fractures are common in children and adolescents due to the relative weakness of the growth plate during development. The "other" designation indicates a fracture type not classified under more specific Salter-Harris categories.

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, 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
• Anatomical factors affecting bone healing

Symptoms

• Persistent pain and swelling at the shoulder or upper arm
• Limited range of motion
• Visible deformity in severe cases
• Difficulty moving the arm
• Tenderness to touch 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 prior treatment and healing timeline, is also important.

Treatment Options

• Immobilization: A sling or cast may be used to stabilize the arm during healing.
• Surgical intervention: May be required to realign and fix the fracture, such as with pins or plates.
• Bone grafting: Sometimes necessary to promote healing in cases of nonunion.
• Physical therapy: To restore strength and range of motion after treatment.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Regular follow-up with imaging is typically required to monitor healing. Long-term outcomes may include residual stiffness or deformity if healing is incomplete.

Complications

• Chronic pain
• Limited arm function
• Growth disturbances (if the growth plate is affected)
• Need for additional surgery

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports to reduce injury risk.
• Follow post-treatment guidelines to support healing.

When to Seek Professional Help

Seek care if pain worsens, swelling increases, or movement becomes more limited. Prompt evaluation is important if nonunion is suspected or if new symptoms develop.

Tips for Medical Coders

Document the fracture type, laterality (right arm), and encounter status (subsequent) clearly. Note the presence of nonunion, as this impacts coding and may require additional documentation to support the diagnosis. Ensure the mechanism of injury and treatment history are recorded to justify the code selection.