S72.343M Displaced spiral fracture of shaft of unspecified femur, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Displaced Spiral Fracture of Shaft of Unspecified Femur, Subsequent Encounter for Open Fracture Type I or II with Nonunion (ICD-10 Code: S72.343M)

Summary

This condition describes a spiral-patterned break in the shaft (long central portion) of the femur (thigh bone), where the bone fragments are displaced from their normal alignment. The fracture results from rotational forces applied along the bone's axis, creating a helical or corkscrew-shaped break. The term "unspecified femur" indicates the side (right or left) is not documented. This is a subsequent encounter for an open fracture type I or II, meaning the fracture communicates with the external environment but has limited soft tissue damage, and nonunion indicates the fracture has failed to heal properly after an expected time frame.

Causes

Often results from high-impact trauma, such as a fall, motor vehicle accident, or sports injury. The spiral pattern typically occurs when a rotational force is applied to the femur, causing the bone to twist and fracture along a helical path. The open fracture component suggests the bone has pierced the skin or a wound extends to the fracture site, and nonunion may arise from inadequate immobilization, poor blood supply, infection, or excessive motion at the fracture site.

Risk Factors

• Participation in high-impact or rotational activities (e.g., contact sports, skiing).
• Osteoporosis or weakened bone conditions.
• Advanced age, due to decreased bone density.
• Prior history of fractures or bone abnormalities.
• Trauma involving significant rotational force.
• Open fractures may be more likely in cases with severe trauma or inadequate initial treatment.
• Nonunion risk increases with poor blood supply, infection, or inadequate immobilization.

Symptoms

• Persistent pain at the fracture site, often worsening with movement.
• Swelling, bruising, or tenderness that may not resolve over time.
• Inability to bear weight or move the affected leg.
• Visible deformity or shortening of the leg (if displaced).
• Possible numbness or tingling if nerve involvement occurs.
• Open wound or exposed bone (for open fracture component).
• Lack of healing progress over several months.

Diagnosis

Physical examination to assess pain, alignment, and soft tissue damage. Imaging studies, such as X-rays, CT scans, or MRIs, are used to confirm the fracture pattern, displacement, and nonunion. The open fracture type is determined by evaluating the wound size, contamination, and soft tissue injury. Additional tests, like blood work or cultures, may be performed to assess for infection or healing potential.

Treatment Options

Treatment focuses on promoting fracture union and managing the open wound. Options may include surgical intervention, such as internal fixation with plates or screws, bone grafting to stimulate healing, or external fixation devices. Antibiotics are often prescribed for open fractures to prevent infection. Physical therapy is typically recommended to restore function and strength once healing progresses.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the success of treatment, and the patient's overall health. Nonunion may require additional interventions, such as revision surgery or bone stimulation techniques. Regular follow-up with imaging is necessary to monitor healing. Long-term outcomes may include residual pain, limited mobility, or the need for assistive devices.

Complications

• Infection at the fracture site or open wound.
• Delayed or failed healing (nonunion or malunion).
• Nerve or vascular damage.
• Chronic pain or arthritis.
• Limited range of motion or muscle weakness.
• Need for additional surgeries.

Lifestyle & Prevention

• Avoid high-impact activities that risk falls or trauma.
• Maintain bone health through adequate calcium and vitamin D intake.
• Use protective equipment during sports or high-risk activities.
• Follow post-treatment instructions carefully to support healing.
• Attend all follow-up appointments to monitor progress.

When to Seek Professional Help

Seek immediate medical attention for severe pain, visible bone, or signs of infection (e.g., fever, increased redness, pus). Contact a healthcare provider if symptoms worsen, or if there is no improvement in pain or mobility after initial treatment.

Tips for Medical Coders

Document the fracture type (spiral, displaced), femur side (unspecified), encounter type (subsequent), open fracture classification (type I or II), and nonunion status clearly. Ensure the open fracture details and nonunion are supported by clinical notes. Use this code only when the fracture is open type I or II and nonunion is confirmed.