S62.329K Displaced fracture of shaft of unspecified metacarpal bone, subsequent encounter for fracture with nonunion

Name of the Condition

• Displaced fracture of shaft of unspecified metacarpal bone, subsequent encounter for fracture with nonunion

Summary

A displaced fracture of the shaft of an unspecified metacarpal bone, with nonunion, refers to a break in the middle portion of one of the hand bones (excluding the thumb) where the bone fragments are misaligned and have failed to heal properly. This condition is documented during a subsequent encounter for treatment, indicating the fracture has not united after an expected healing period. The injury typically results from trauma or impact to the hand, leading to a fracture that disrupts the normal alignment of the bone and prevents complete healing.

Causes

Direct trauma, such as a fall or blow to the hand. Sports-related injuries or accidents. Repetitive stress or overuse.

Risk Factors

• Participation in contact sports or high-impact activities.
• Reduced bone density or osteoporosis.
• Occupational hazards involving manual labor.
• Poor blood supply to the fracture site.
• Inadequate immobilization during initial treatment.

Symptoms

• Persistent pain and swelling in the hand.
• Tenderness or bruising around the affected area.
• Difficulty moving the fingers or hand.
• Possible deformity or misalignment.
• No improvement in symptoms over time, despite prior treatment.

Diagnosis

Physical examination by a healthcare provider to assess tenderness, swelling, or deformity. Imaging tests, such as X-rays, to confirm the fracture and evaluate its extent. Assessment of healing progress to determine if nonunion is present. Additional imaging, like CT scans, may be used to evaluate bone union and alignment.

Treatment Options

• Surgical intervention to realign the bone and promote healing, such as bone grafting or internal fixation.
• Immobilization with a cast or splint to support the fracture during healing.
• Pain management using over-the-counter or prescription medications.
• Physical therapy to restore mobility and strength once healing is underway.
• Monitoring for signs of infection or further complications.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. With appropriate intervention, many patients achieve improved function and reduced pain. Follow-up care is essential to monitor healing progress and adjust treatment as needed. Regular imaging may be required to assess bone union.

Complications

• Chronic pain or discomfort.
• Limited range of motion in the hand or fingers.
• Persistent deformity or misalignment.
• Increased risk of future fractures.
• Infection, particularly if surgery is performed.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or manual labor.
• Maintain bone health through a balanced diet and regular exercise.
• Follow post-treatment instructions carefully to support healing.

When to Seek Professional Help

Seek medical attention if symptoms worsen, new pain or swelling develops, or there is no improvement in symptoms after treatment. Immediate care is needed if there are signs of infection, such as fever, redness, or drainage from the fracture site.

Tips for Medical Coders

Document the encounter as a subsequent visit for fracture with nonunion. Ensure clinical notes specify the nonunion status and any surgical or therapeutic interventions performed. Code S62.329K is appropriate when the fracture is displaced, involves the shaft of an unspecified metacarpal bone, and is documented during a subsequent encounter for treatment of nonunion.