S42.266K Nondisplaced fracture of lesser tuberosity of unspecified humerus, subsequent encounter for fracture with nonunion

Name of the Condition

• Nondisplaced fracture of lesser tuberosity of unspecified humerus, subsequent encounter for fracture with nonunion (ICD Code: S42.266K)

Summary

This condition involves a nondisplaced fracture of the lesser tuberosity, a bony prominence on the humerus near the shoulder joint, during a subsequent encounter where the fracture has failed to heal (nonunion). The fracture remains aligned without displacement, but the lack of healing indicates a persistent break in the bone. The lesser tuberosity serves as an attachment point for the subscapularis muscle, and nonunion may affect muscle function or joint stability.

Causes

Nondisplaced fractures of the lesser tuberosity typically result from direct trauma, such as falls onto the shoulder, motor vehicle accidents, or high-impact sports injuries. Nonunion may occur due to inadequate immobilization, poor blood supply to the fracture site, infection, or underlying conditions that impair bone healing.

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.
• Smoking or poor nutrition, which can hinder bone healing.
• Previous fractures or bone disorders that weaken the skeletal structure.
• Conditions like diabetes or vascular disease that impair circulation.

Symptoms

• Persistent pain in the shoulder or upper arm, often worsening with movement.
• Swelling, bruising, or tenderness at the fracture site.
• Limited range of motion in the shoulder or arm.
• Possible clicking or grinding sensations during movement.
• Weakness in the affected arm, especially with overhead activities.

Diagnosis

Physical examination to assess pain, range of motion, and tenderness. Imaging tests, including X-rays, to confirm nonunion and evaluate bone alignment. CT scans or MRIs may be used to assess bone healing and rule out other injuries. Blood tests may check for underlying conditions affecting healing.

Treatment Options

• Immobilization with a sling or brace to support the arm and promote healing.
• Pain management with medications or physical therapy to restore function.
• Surgical intervention, such as bone grafting or internal fixation, if nonunion persists.
• Rehabilitation exercises to improve strength and mobility once healing progresses.

Prognosis and Follow-Up

Prognosis depends on the severity of nonunion and response to treatment. Most patients recover with proper care, but healing may take longer than typical fractures. Regular follow-up with imaging is necessary to monitor progress. Physical therapy is often recommended to restore function and prevent stiffness.

Complications

• Chronic pain or persistent weakness in the shoulder or arm.
• Limited range of motion or joint stiffness.
• Infection, especially if surgical intervention is required.
• Nerve or blood vessel damage near the fracture site.
• Increased risk of future fractures due to weakened bone.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Use protective gear during sports or activities with fall risks.
• Perform regular strength and flexibility exercises to support joint stability.

When to Seek Professional Help

Seek immediate care if you experience severe pain, swelling, or deformity after an injury. Contact a healthcare provider if pain persists, worsens, or interferes with daily activities. Seek urgent care for signs of infection, such as fever, redness, or drainage from the fracture site.

Tips for Medical Coders

Document the encounter as a subsequent visit for fracture with nonunion. Include details on the fracture’s alignment, healing status, and any interventions performed. Ensure documentation supports the nonunion diagnosis and subsequent encounter context to justify the code.