S72.326M Nondisplaced transverse fracture of shaft of unspecified femur, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Nondisplaced Transverse Fracture of Shaft of Unspecified Femur, Subsequent Encounter for Open Fracture Type I or II with Nonunion (ICD-10 Code: S72.326M)

Summary

A nondisplaced transverse fracture of the femur shaft is a break in the long, central portion of the thigh bone where the fracture line runs horizontally across the bone, and the bone fragments remain aligned without separation. This type of fracture involves the diaphysis (main structural part) of the femur and may be associated with soft tissue injury or instability, though displacement is absent. The code S72.326M specifies a subsequent encounter for an open fracture type I or II with nonunion, indicating the fracture has not healed properly after an initial injury that communicated with the external environment through a skin wound (typically small and clean) and requires ongoing management.

Causes

Such fractures typically result from high-impact trauma, such as motor vehicle accidents, falls from significant heights, or direct blows to the thigh. Rotational forces or axial loading (e.g., during sports or industrial injuries) can also cause this type of break. Open fractures occur when the trauma is severe enough to pierce the skin, exposing the fracture site to the external environment. Nonunion may develop due to inadequate immobilization, poor blood supply, infection, or other factors that impede healing.

Risk Factors

• Participation in high-impact sports or activities.
• Osteoporosis or other bone-weakening conditions.
• Advanced age, due to decreased bone density.
• Prior history of fractures or bone abnormalities.
• Trauma or accidents involving significant force.
• Smoking or poor nutrition, which can impair bone healing.

Symptoms

• Persistent pain at the fracture site, often worsening with activity.
• Swelling, bruising, or tenderness around the affected area.
• Inability to bear weight on the affected leg.
• Possible numbness or tingling if nerve involvement occurs.
• Visible or palpable gap at the fracture site (if nonunion is severe).

Diagnosis

Physical examination to assess pain, alignment, and function. Imaging tests, such as X-rays or CT scans, are used to confirm the fracture type, assess healing progress, and identify nonunion. Additional tests, like blood work or bone scans, may be performed to evaluate for infection or underlying conditions affecting bone health.

Treatment Options

Treatment focuses on promoting healing and managing the open fracture. Options may include surgical intervention (e.g., internal fixation with plates or screws) to stabilize the fracture, bone grafting to stimulate healing, or external fixation devices. Antibiotics may be prescribed to prevent or treat infection. Physical therapy is often recommended to restore strength and mobility once healing progresses.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion, overall health, and adherence to treatment. Regular follow-up appointments are necessary to monitor healing through imaging and adjust treatment as needed. Full recovery may take several months, and some patients may experience long-term mobility limitations or require ongoing management.

Complications

• Nonunion or delayed healing, requiring additional interventions.
• Infection at the fracture site or surgical site.
• Nerve or blood vessel damage, leading to numbness, weakness, or circulation issues.
• Chronic pain or arthritis in the affected area.
• Limited mobility or functional impairment.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Follow a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Use protective equipment during sports or activities with fall risks.
• Maintain a healthy weight to reduce stress on bones.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or inability to move the leg, or if you notice signs of infection (e.g., redness, pus, fever). Contact your healthcare provider if pain persists or worsens despite treatment, or if you have concerns about healing progress.

Tips for Medical Coders

Document the fracture type (open I or II), the presence of nonunion, and the subsequent encounter status clearly in the medical record. Ensure the open fracture classification and nonunion are supported by clinical findings or imaging. The code S72.326M is specific to subsequent encounters; initial encounters or closed fractures should use different codes. Verify that all components of the code (fracture location, displacement, open type, and nonunion) are accurately reflected in the documentation.