S62.145K Nondisplaced fracture of body of hamate [unciform] bone, left wrist, subsequent encounter for fracture with nonunion

Name of the Condition

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

Summary

This condition refers to a break in the body of the hamate bone (a small carpal bone on the ulnar side of the left wrist) where bone fragments remain in their normal position, but the fracture has failed to heal properly during a follow-up visit. The hamate contributes to wrist stability and grip function. Nondisplaced fractures typically involve minimal structural disruption, while nonunion indicates the fracture site has not progressed to bony union within the expected timeframe.

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 may result from inadequate immobilization, poor blood supply to the bone, or other factors affecting healing.

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.

Symptoms

• Persistent pain, swelling, or tenderness in the ulnar side of the left wrist.
• Bruising or discoloration around the injury site (may be reduced compared to initial injury).
• Limited range of motion or difficulty moving the hand or fingers.
• No visible deformity (consistent with nondisplaced fracture).

Diagnosis

Physical examination to assess pain, swelling, and wrist mobility. Imaging tests, such as X-rays, CT scans, or MRIs, to confirm the fracture and evaluate healing progress. Additional tests may be used to assess blood flow or bone density if nonunion is suspected.

Treatment Options

Treatment may include immobilization with a cast or splint to stabilize the wrist, physical therapy to restore function, or surgical intervention to promote healing. Pain management and activity modification are often part of the plan. In some cases, bone grafting or other procedures may be necessary to address nonunion.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Regular follow-up visits are typically required to monitor healing. Full recovery may take longer than with routine healing fractures, and some functional limitations may persist.

Complications

• Chronic pain or discomfort in the wrist.
• Reduced range of motion or grip strength.
• Increased risk of future fractures.
• Potential need for additional interventions if nonunion persists.

Lifestyle & Prevention

• Avoid high-impact activities that risk wrist injury.
• Use protective gear during sports or work.
• Maintain bone health through proper nutrition and exercise.
• Follow post-injury care instructions to support healing.

When to Seek Professional Help

Seek medical attention if pain worsens, swelling increases, or mobility decreases. Contact a healthcare provider if symptoms do not improve with treatment or if new symptoms develop.

Tips for Medical Coders

Document the encounter as a subsequent visit for fracture with nonunion. Include details about the fracture's status, treatment provided, and any imaging or clinical findings supporting nonunion. Ensure documentation aligns with the code's specificity for left wrist, nondisplaced fracture, and nonunion.