S62.116P Nondisplaced fracture of triquetrum [cuneiform] bone, unspecified wrist, subsequent encounter for fracture with malunion

Name of the Condition

• Nondisplaced fracture of triquetrum [cuneiform] bone, unspecified wrist, subsequent encounter for fracture with malunion

Summary

This condition involves a break in the triquetrum bone of the wrist without displacement of bone fragments, occurring during a subsequent encounter for treatment. The triquetrum is a small carpal bone on the ulnar (pinky) side of the wrist, contributing to wrist stability. Malunion indicates the fracture has healed in a non-anatomical position, potentially affecting wrist function. Nondisplaced fractures mean bone fragments remained aligned initially, though healing may not have restored normal alignment.

Causes

Usually caused by direct trauma to the wrist, such as a fall onto an outstretched hand, a blow to the wrist, or a twisting injury. Malunion may result from inadequate immobilization, poor blood supply to the bone, or delayed treatment during the initial healing phase.

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.
• Inadequate immobilization or non-compliance with treatment during initial healing.

Symptoms

• Persistent pain, swelling, and tenderness in the ulnar side of the wrist.
• Bruising or discoloration around the injury site.
• Limited range of motion or difficulty moving the hand or fingers.
• Visible deformity or altered wrist alignment due to malunion.

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 alignment. Comparison with prior imaging may be used to assess malunion.

Treatment Options

• Immobilization with a cast or splint to support the wrist and promote healing.
• Physical therapy to restore range of motion and strength.
• Pain management with medications or other modalities.
• Surgical intervention may be considered for severe malunion affecting function.

Prognosis and Follow-Up

Prognosis depends on the extent of malunion and its impact on wrist function. Follow-up imaging and clinical assessments monitor healing and functional recovery. Long-term outcomes may include persistent pain or reduced mobility if malunion is significant.

Complications

• Chronic pain or stiffness in the wrist.
• Reduced range of motion or grip strength.
• Increased risk of future fractures due to altered bone alignment.
• Nerve or tendon irritation from malpositioned bone.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities with fall risks.
• Maintain bone health through adequate nutrition and exercise.
• Follow post-injury care instructions to prevent malunion.

When to Seek Professional Help

Seek care if pain worsens, swelling increases, or new deformity develops. Consult a provider if wrist function does not improve with treatment or if numbness, tingling, or weakness occurs.

Tips for Medical Coders

Document the presence of malunion and specify the encounter as subsequent. Include details on fracture healing status and any functional impact. Ensure documentation supports the diagnosis and aligns with the code’s description.