S62.232P Other displaced fracture of base of first metacarpal bone, left hand, subsequent encounter for fracture with malunion

Name of the Condition

• Other displaced fracture of base of first metacarpal bone, left hand, subsequent encounter for fracture with malunion

Summary

This condition involves a displaced fracture at the base of the first metacarpal bone (connecting the thumb to the wrist) in the left hand. The fracture has healed with malunion, meaning the bone fragments did not align properly during healing, and this is a subsequent encounter for care. Malunion may affect joint stability, function, or range of motion. The severity and management depend on the degree of displacement and functional impact.

Causes

Typically caused by direct trauma, such as a fall onto an outstretched hand, a forceful blow to the thumb, or a crushing injury. Malunion occurs when the fracture does not heal in proper alignment, often due to inadequate immobilization, severe initial displacement, or delayed treatment.

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

Symptoms

• Persistent pain, swelling, or tenderness at the base of the thumb or left hand.
• Bruising or discoloration around the injury site.
• Limited range of motion or difficulty moving the thumb.
• Visible deformity or altered hand function.
• Possible joint instability or weakness.

Diagnosis

Physical examination to assess pain, swelling, mobility, and deformity. Imaging tests, such as X-rays, CT scans, or MRIs, to confirm malunion, evaluate bone alignment, and assess joint involvement. Comparison with prior imaging may help determine the extent of displacement.

Treatment Options

• Conservative management: Physical therapy to improve range of motion, strength, and function. Pain management and activity modification.
• Surgical intervention: Osteotomy (bone realignment) or joint reconstruction if malunion causes significant functional impairment or pain.
• Supportive care: Orthotics or splints to stabilize the joint during healing or rehabilitation.

Prognosis and Follow-Up

Prognosis depends on the severity of malunion and functional impact. Most patients improve with conservative or surgical treatment, but residual stiffness or weakness may persist. Regular follow-up with imaging and functional assessments is recommended to monitor healing and adjust care.

Complications

• Chronic pain or discomfort.
• Reduced range of motion or joint stiffness.
• Arthritis or joint degeneration due to malalignment.
• Nerve or tendon irritation from altered bone structure.
• Need for additional surgery if malunion worsens.

Lifestyle & Prevention

• Use protective gear during high-risk activities (e.g., sports).
• Maintain bone health with adequate calcium and vitamin D.
• Follow post-injury immobilization and rehabilitation protocols strictly.
• Avoid repetitive or forceful hand movements that may stress the healing bone.

When to Seek Professional Help

Seek care if you experience worsening pain, swelling, or deformity; loss of function; or signs of infection (e.g., redness, warmth, fever). Prompt evaluation is important if malunion is suspected or if symptoms interfere with daily activities.

Tips for Medical Coders

Document the presence of malunion and the subsequent encounter for fracture care. Include details on imaging findings, functional impact, and treatment provided. Ensure documentation supports the diagnosis and aligns with the code’s specificity for malunion and follow-up care.