S62.242K Displaced fracture of shaft of first metacarpal bone, left hand, subsequent encounter for fracture with nonunion

Name of the Condition

• Displaced fracture of shaft of first metacarpal bone, left hand, subsequent encounter for fracture with nonunion

Summary

This condition involves a break in the shaft (midportion) of the first metacarpal bone, which connects the thumb to the wrist, with displacement of the bone fragments. The fracture has failed to heal properly (nonunion) and is being addressed during a subsequent encounter. Displacement means the broken pieces are not aligned properly, and nonunion indicates the fracture has not progressed to union after an expected healing period.

Causes

Typically caused by direct trauma, such as a fall onto an outstretched hand, a blow to the thumb or hand, or a crushing injury. High-impact activities or accidents may also lead to fractures in this area. Nonunion can result from inadequate immobilization, poor blood supply, infection, or severe displacement.

Risk Factors

• Participation in contact sports or activities with a high risk of falls.
• Osteoporosis or weakened bone structure, especially in older adults.
• Previous hand or thumb injuries that may have compromised bone integrity.
• Smoking or poor nutrition, which can impair bone healing.
• Inadequate initial treatment or immobilization of the fracture.

Symptoms

• Persistent pain, swelling, and tenderness in the thumb or base of the hand.
• Bruising or discoloration around the injury site.
• Limited range of motion or difficulty moving the thumb.
• Visible deformity in severe cases.
• No improvement in symptoms after an expected healing period.

Diagnosis

Physical examination to assess pain, swelling, and mobility. Imaging tests, such as X-rays, CT scans, or MRIs, to confirm the fracture, evaluate displacement, and assess for nonunion (e.g., a persistent fracture line with no bridging bone). Additional tests may be used to rule out infection or other complications.

Treatment Options

• Surgical intervention: May include bone grafting, internal fixation (plates, screws), or external fixation to promote healing.
• Immobilization: Continued use of casts or splints to stabilize the fracture during healing.
• Physical therapy: To restore strength and range of motion once healing progresses.
• Pain management: Medications to alleviate discomfort during recovery.

Prognosis and Follow-Up

Prognosis depends on the severity of displacement, blood supply to the bone, and response to treatment. Nonunion fractures may require extended healing time or additional interventions. Regular follow-up with imaging is necessary to monitor progress and adjust treatment as needed.

Complications

• Chronic pain or stiffness in the thumb or hand.
• Persistent nonunion or malunion (improper healing).
• Infection, especially if surgery is required.
• Reduced grip strength or functional impairment.

Lifestyle & Prevention

• Avoid high-risk activities or use protective gear during sports.
• Maintain bone health through a balanced diet rich in calcium and vitamin D.
• Quit smoking, as it impairs bone healing.
• Follow post-injury care instructions to support proper healing.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, swelling, deformity, or an open wound at the injury site. Contact a healthcare provider if symptoms worsen or do not improve with initial treatment, or if there are signs of infection (e.g., fever, redness, pus).

Tips for Medical Coders

Document the subsequent encounter for fracture with nonunion, including clinical evidence of failed healing (e.g., imaging findings, lack of progress over time). Ensure documentation supports the diagnosis of nonunion and the need for ongoing care. Note any surgical interventions or complications that may affect coding.