S62.345K Nondisplaced fracture of base of fourth metacarpal bone, left hand, subsequent encounter for fracture with nonunion

Name of the Condition

• Nondisplaced fracture of base of fourth metacarpal bone, left hand, subsequent encounter for fracture with nonunion

Summary

A nondisplaced fracture of the base of the fourth metacarpal bone in the left hand involves a small break or crack in the bone that connects to the ring finger, where the bone fragments remain in proper alignment. This code applies to a subsequent encounter for a fracture that has failed to heal (nonunion) after an initial injury.

Causes

Direct trauma, such as a fall onto the hand or a blow to the area, is the primary cause. Sports-related injuries, accidents, or repetitive stress may also lead to this fracture. Nonunion can result from inadequate immobilization, poor blood supply to the bone, or other factors that impede healing.

Risk Factors

• Participation in activities with a risk of hand trauma, such as contact sports or manual labor.
• Reduced bone density, which can increase susceptibility to fractures.
• Inadequate hand protection during high-risk activities.
• Conditions that impair bone healing, such as diabetes or smoking.

Symptoms

• Persistent pain and tenderness at the base of the fourth metacarpal bone.
• Swelling and bruising around the affected area.
• Difficulty or pain when moving the ring finger.
• Possible clicking or grinding sensation with movement.

Diagnosis

Physical examination by a healthcare provider to assess tenderness, swelling, or deformity. Imaging tests, such as X-rays, are used to confirm the fracture and verify nonunion, which is typically diagnosed when healing has not progressed over time.

Treatment Options

• Surgical intervention: May include bone grafting, internal fixation, or other procedures to promote healing.
• Immobilization: Continued use of a splint or cast to stabilize the area.
• Pain management: Medications or therapies to alleviate discomfort.
• Physical therapy: To restore function and strength after healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Regular follow-up with imaging is often necessary to monitor healing progress. Recovery may take several months, and some patients may experience long-term stiffness or reduced function.

Complications

• Chronic pain or discomfort.
• Persistent nonunion requiring additional intervention.
• Reduced range of motion in the hand or finger.
• Potential for arthritis in the affected joint over time.

Lifestyle & Prevention

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

When to Seek Professional Help

Seek care if pain worsens, swelling increases, or movement becomes more difficult. Prompt evaluation is important if signs of infection (e.g., redness, fever) or new deformity occur.

Tips for Medical Coders

This code is used for a subsequent encounter for a nondisplaced fracture of the base of the fourth metacarpal bone in the left hand with nonunion. Documentation should specify the fracture site, laterality, and the presence of nonunion. Ensure the encounter is classified as "subsequent" and that the nonunion is clearly noted to support accurate coding.