S42.262P Displaced fracture of lesser tuberosity of left humerus, subsequent encounter for fracture with malunion

Name of the Condition

• Displaced fracture of lesser tuberosity of left humerus, subsequent encounter for fracture with malunion (ICD Code: S42.262P)

Summary

This condition involves a displaced fracture of the lesser tuberosity, a bony prominence on the left humerus near the shoulder joint, during a subsequent encounter for care. The fracture has healed with malunion, meaning the bone fragments have joined in a non-anatomical position. This may affect the attachment of the subscapularis tendon and surrounding structures, potentially impacting shoulder function or stability.

Causes

Displaced fractures of the lesser tuberosity typically result from direct trauma, such as a fall onto the shoulder or a forceful pull on the arm. High-impact injuries, including motor vehicle accidents or sports-related collisions, may also cause this type of fracture. Malunion occurs when the fracture heals in a misaligned position, often due to inadequate immobilization, poor blood supply, or excessive movement during the healing phase.

Risk Factors

• Advanced age and osteoporosis, which reduce bone density and healing capacity.
• Participation in contact sports or activities with a high risk of falls.
• Previous fractures or bone disorders that weaken the skeletal structure.
• Inadequate immobilization or premature weight-bearing during initial healing.

Symptoms

• Persistent or recurrent pain in the shoulder or upper arm, especially with movement.
• Limited range of motion or stiffness in the shoulder joint.
• Visible or palpable deformity at the fracture site.
• Weakness or difficulty performing overhead or rotational arm movements.

Diagnosis

Physical examination to assess pain, range of motion, and deformity. Imaging tests, including X-rays, to evaluate the fracture's alignment and healing status. CT scans or MRIs may be used to assess malunion severity and its impact on surrounding structures.

Treatment Options

Treatment focuses on managing symptoms and improving function. Options may include physical therapy to restore mobility and strength, pain management with medications, and activity modification. Surgical intervention, such as osteotomy or hardware removal, may be considered for severe malunion affecting function.

Prognosis and Follow-Up

Prognosis depends on the extent of malunion and its impact on shoulder function. Most patients experience improved symptoms with conservative management, though some may have persistent limitations. Regular follow-up is necessary to monitor healing and adjust treatment plans as needed.

Complications

• Chronic pain or discomfort.
• Reduced shoulder mobility or strength.
• Increased risk of future fractures due to altered bone structure.
• Nerve or vascular injury from malaligned bone fragments.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Engage in low-impact exercises to maintain joint flexibility.
• Ensure adequate calcium and vitamin D intake to support bone health.
• Use protective gear during sports or activities with fall risks.

When to Seek Professional Help

Seek care if you experience worsening pain, new deformity, or loss of function. Prompt evaluation is important if you notice numbness, tingling, or weakness in the arm or hand, as these may indicate nerve involvement.

Tips for Medical Coders

Document the presence of malunion and the subsequent encounter phase clearly in the medical record. Ensure the fracture's location (left humerus, lesser tuberosity) and displacement are specified. Note any contributing factors, such as trauma history or healing complications, to support code assignment.