S62.142K Displaced fracture of body of hamate [unciform] bone, left wrist, subsequent encounter for fracture with nonunion

Name of the Condition

• Displaced fracture of body of hamate [unciform] bone, left wrist, subsequent encounter for fracture with nonunion

Summary

This condition involves a break in the body of the hamate bone, one of the small carpal bones in the left wrist, with displacement of bone fragments. The hamate is located on the ulnar (pinky) side of the wrist and contributes to wrist stability and grip. The fracture is classified as a subsequent encounter, indicating ongoing care after the initial treatment phase, and is complicated by nonunion, meaning the bone has failed to heal properly. This may affect wrist function and require targeted interventions to promote healing or address functional impairment.

Causes

Usually caused by direct trauma to the wrist, such as a fall onto an outstretched hand, a blow to the wrist, or a crushing injury. High-impact activities or accidents may also lead to fractures in this specific bone. Nonunion can result from inadequate immobilization, poor blood supply to the bone, infection, or excessive movement during the healing process.

Risk Factors

• Participation in contact sports or activities with a high risk of falls.
• Osteoporosis or weakened bone structure, especially in older adults.
• Previous wrist injuries or fractures.
• Smoking or other factors that impair bone healing.
• Inadequate initial treatment or follow-up care.

Symptoms

• Persistent pain, swelling, and tenderness on the ulnar side of the left wrist.
• Bruising or discoloration around the injury site.
• Limited range of motion or difficulty moving the hand or fingers.
• Visible deformity in severe cases.
• Possible clicking or grinding sensations with wrist movement.

Diagnosis

Physical examination to assess pain, swelling, and wrist mobility. Imaging tests, such as X-rays, CT scans, or MRIs, to confirm the fracture, evaluate its extent and alignment, and assess for nonunion. Additional tests may be used to rule out infection or other complications.

Treatment Options

• Immobilization with a cast or splint to stabilize the wrist and promote healing.
• Surgical intervention, such as bone grafting, internal fixation, or removal of nonunion tissue, to encourage bone union.
• Physical therapy to restore range of motion and strength once healing progresses.
• Pain management with medications or other modalities.
• 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. Some patients may achieve full healing with appropriate care, while others may experience long-term functional limitations. Regular follow-up appointments and imaging are typically required to monitor healing progress and adjust treatment as needed.

Complications

• Chronic pain or stiffness in the wrist.
• Persistent nonunion or delayed healing.
• Arthritis or joint damage due to improper healing.
• Nerve or tendon injury from the fracture or surgical intervention.
• Infection, particularly if surgery is performed.

Lifestyle & Prevention

• Avoid high-impact activities or sports that risk wrist injury until cleared by a healthcare provider.
• Use protective gear, such as wrist guards, during activities with a fall risk.
• Maintain bone health through a balanced diet rich in calcium and vitamin D.
• Follow post-treatment guidelines for immobilization and activity restrictions to support healing.
• Quit smoking, as it can impair bone healing.

When to Seek Professional Help

• Worsening pain, swelling, or bruising around the wrist.
• New or increasing deformity of the wrist or hand.
• Signs of infection, such as redness, warmth, or pus at the injury site.
• Difficulty moving the wrist or fingers despite treatment.
• Persistent symptoms after the expected healing period.

Tips for Medical Coders

Document the subsequent encounter status and the presence of nonunion clearly in the medical record. Ensure that the fracture is specified as displaced and involving the body of the hamate bone in the left wrist. Include details about the treatment provided and any imaging results that confirm nonunion to support accurate coding.