S72.046N Nondisplaced fracture of base of neck of unspecified femur, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

• Nondisplaced fracture of base of neck of unspecified femur, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion (S72.046N)

Summary

This condition involves a break in the upper portion of the femur (thigh bone) at the base of the femoral neck, near the hip joint. The fracture is nondisplaced, meaning the bone fragments remain in their normal anatomical position. It is classified as a subsequent encounter for an open fracture type IIIA, IIIB, or IIIC, indicating a break in the skin with severe contamination or extensive soft tissue damage. The term "nonunion" signifies that the fracture has failed to heal properly after an extended period. This type of injury requires evaluation to assess the fracture, manage the open wound, and address the nonunion.

Causes

High-impact trauma, such as falls or motor vehicle accidents, is a common cause. In older adults, particularly those with weakened bone density (e.g., osteoporosis), fractures may occur from minor trauma or low-impact events. Direct force to the hip or thigh region can also result in this injury. Nonunion may develop due to inadequate immobilization, poor blood supply to the fracture site, infection, or other factors that impede healing.

Risk Factors

• Advanced age, especially in individuals over 65
• Osteoporosis or other bone-weakening conditions
• Female gender, due to higher osteoporosis prevalence
• History of prior fractures or bone diseases
• Participation in high-risk activities (e.g., contact sports)
• Poor nutrition or smoking, which can impair bone healing
• Inadequate initial fracture management

Symptoms

• Persistent severe pain in the hip or groin area
• Swelling, bruising, or tenderness around the hip
• Inability to bear weight on the affected leg
• Visible wound or open area (if the fracture is open)
• Leg shortening or external rotation of the affected limb
• Limited range of motion in the hip joint
• Possible signs of infection, such as redness, warmth, or drainage

Diagnosis

Physical examination to assess pain, mobility, and limb alignment. Imaging studies, including X-rays or CT scans, to visualize the fracture and confirm nonunion. Assessment of the open wound to determine the severity of contamination or tissue damage. Laboratory tests may be performed to check for infection or assess bone healing markers.

Treatment Options

Surgical intervention is often required to address the nonunion and manage the open fracture. This may include internal fixation with screws or plates to stabilize the fracture, bone grafting to promote healing, and debridement to clean the wound and remove infected or dead tissue. Antibiotics may be prescribed to treat or prevent infection. Physical therapy is typically recommended to restore mobility and strength after healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the success of treatment, and the patient's overall health. Nonunion fractures may require additional interventions if initial treatment fails. Regular follow-up appointments are necessary to monitor healing, assess for complications, and adjust treatment plans. Long-term mobility and function may be affected, particularly if the hip joint is compromised.

Complications

• Infection at the fracture site or wound
• Delayed or failed healing (nonunion)
• Avascular necrosis (loss of blood supply to the femoral head)
• Post-traumatic arthritis of the hip joint
• Chronic pain or disability
• Nerve or blood vessel damage

Lifestyle & Prevention

• Maintain a diet rich in calcium and vitamin D to support bone health
• Engage in weight-bearing exercises to strengthen bones
• Avoid high-risk activities that increase fracture risk
• Use assistive devices (e.g., canes, walkers) to prevent falls, especially in older adults
• Quit smoking, as it impairs bone healing
• Follow post-treatment instructions carefully to promote proper healing

When to Seek Professional Help

Seek immediate medical attention if you experience severe hip pain, inability to bear weight, visible wounds, or signs of infection (e.g., fever, redness, drainage). Contact your healthcare provider if pain persists or worsens after treatment, or if you notice new symptoms such as swelling or decreased mobility.

Tips for Medical Coders

Document the encounter as a subsequent visit for an open fracture type IIIA, IIIB, or IIIC with nonunion. Ensure the fracture is confirmed as nondisplaced and specify the femur as unspecified. Include details about the open fracture type and the presence of nonunion to support accurate coding. Verify that the encounter is classified as subsequent (not initial) and that all relevant clinical findings are documented.