S42.265K Nondisplaced fracture of lesser tuberosity of left humerus, subsequent encounter for fracture with nonunion

Name of the Condition

• Nondisplaced fracture of lesser tuberosity of left humerus, subsequent encounter for fracture with nonunion (ICD Code: S42.265K)

Summary

This condition involves a nondisplaced fracture of the lesser tuberosity, a bony prominence on the front of the left humerus near the shoulder joint, during a subsequent encounter for fracture care. The fracture has failed to heal properly, resulting in nonunion, where the bone fragments do not fuse together as expected. This stage occurs after initial treatment and indicates a delayed or incomplete healing process that may require further intervention.

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. Low-energy trauma may also cause this type of fracture in individuals with weakened bones, such as those with osteoporosis. Nonunion can develop due to inadequate immobilization, poor blood supply to the fracture site, infection, or excessive movement during the healing phase.

Risk Factors

• Advanced age and osteoporosis, which reduce bone density and impair healing.
• Participation in contact sports or activities with a high risk of falls.
• Previous fractures or bone disorders that weaken the skeletal structure.
• Smoking or poor nutrition, which can hinder bone healing.
• Inadequate initial treatment or noncompliance with immobilization protocols.

Symptoms

• Persistent or worsening pain in the shoulder or upper arm, often lasting beyond the typical healing period.
• Swelling, bruising, or tenderness at the fracture site that does not improve over time.
• Limited range of motion in the shoulder, with difficulty lifting or moving the arm.
• A palpable gap or abnormal motion at the fracture site in some cases.
• Possible muscle weakness due to prolonged disuse or nerve involvement.

Diagnosis

Physical examination to assess pain, range of motion, and deformity, with attention to signs of nonunion. Imaging tests, including X-rays, to evaluate bone alignment and healing progress. CT scans or MRIs may be used for detailed assessment of the fracture site and surrounding tissues. Blood tests may be performed to rule out infection or nutritional deficiencies affecting healing.

Treatment Options

Treatment focuses on promoting bone healing and may include surgical intervention, such as internal fixation with plates or screws, to stabilize the fracture. Non-surgical options include prolonged immobilization, bone grafting, or electrical stimulation to encourage union. Physical therapy is often recommended to restore strength and mobility once healing progresses. Pain management and addressing underlying risk factors, such as smoking cessation or nutritional support, are also important.

Prognosis and Follow-Up

Prognosis depends on the severity of nonunion and the effectiveness of treatment. With appropriate intervention, many patients achieve successful healing and restored function, though recovery may be prolonged. Regular follow-up appointments are necessary to monitor healing through imaging and adjust treatment as needed. Long-term outcomes may include residual stiffness or weakness, which can be managed with ongoing therapy.

Complications

• Persistent pain or chronic disability due to incomplete healing.
• Infection at the fracture site, particularly if surgery is performed.
• Nerve or blood vessel damage from the fracture or surgical intervention.
• Avascular necrosis, where bone tissue dies due to poor blood supply.
• Need for additional surgeries if initial treatment fails to achieve union.

Lifestyle & Prevention

• Avoid high-impact activities or falls that could worsen the injury.
• Follow prescribed immobilization and weight-bearing restrictions strictly.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking and limit alcohol, as both impair healing.
• Engage in gentle range-of-motion exercises as directed by a healthcare provider to prevent stiffness.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or deformity, or if you notice increased difficulty moving your arm. Contact your healthcare provider if pain persists beyond the expected healing period, or if you develop 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 care with nonunion, ensuring the code S42.265K is used. Include details about the fracture's status (e.g., imaging findings, clinical assessment of nonunion) and any interventions performed. Note the duration since the initial injury and whether the patient is under active treatment for nonunion. Avoid using this code for initial encounters or routine healing phases.