S72.046K Nondisplaced fracture of base of neck of unspecified femur, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced fracture of base of neck of unspecified femur, subsequent encounter for closed fracture with nonunion (S72.046K)

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. The term "subsequent encounter" indicates this is a follow-up visit for a previously treated fracture, and "nonunion" signifies that the bone has not healed properly after an expected period. This type of injury requires ongoing evaluation to address the nonunion and determine appropriate management.

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 excessive movement during 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)
• Smoking or poor nutrition, which can impair bone healing
• Certain medical conditions (e.g., diabetes, vascular disease) that affect circulation

Symptoms

• Persistent or worsening hip or groin pain
• Inability to bear weight on the affected leg
• Swelling, bruising, or tenderness around the hip
• Leg shortening or external rotation of the affected limb
• Limited range of motion in the hip joint
• Possible clicking or grinding sensation during movement

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. Additional tests, such as bone scans or MRI, may be used to evaluate blood flow and healing potential. Review of prior treatment and imaging to determine the cause of nonunion.

Treatment Options

• Immobilization with a brace or cast to stabilize the fracture
• Surgical intervention, such as internal fixation with screws or plates, to promote healing
• Bone grafting to stimulate bone growth at the fracture site
• Electrical stimulation or ultrasound therapy to enhance bone healing
• Pain management with medications or physical therapy
• Lifestyle modifications, such as weight-bearing restrictions or activity adjustments

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion, overall health, and response to treatment. Some fractures may heal with conservative measures, while others require surgery. Regular follow-up with imaging is necessary to monitor healing progress. Long-term management may include physical therapy to restore function and prevent future fractures.

Complications

• Chronic pain or disability
• Avascular necrosis (loss of blood supply to the femoral head)
• Infection, particularly with surgical intervention
• Malunion (improper healing in a misaligned position)
• Reduced mobility or arthritis in the hip joint
• Need for additional surgeries if healing does not occur

Lifestyle & Prevention

• Maintain a diet rich in calcium and vitamin D to support bone health
• Engage in weight-bearing exercises to strengthen bones
• Avoid smoking and limit alcohol consumption, which can impair healing
• Use assistive devices (e.g., canes, walkers) to reduce fall risk
• Wear appropriate footwear and modify home environments to prevent falls
• Follow post-treatment guidelines for activity restrictions and rehabilitation

When to Seek Professional Help

Seek immediate medical attention if you experience severe hip pain, inability to bear weight, or signs of infection (e.g., fever, increased swelling, redness). Contact your healthcare provider if pain persists or worsens despite treatment, or if you notice new symptoms such as numbness or changes in limb function.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Include details about the fracture site (base of neck of femur), the absence of displacement, and the presence of nonunion. Note any surgical interventions, imaging results, or treatment plans to support coding accuracy. Ensure documentation aligns with the specific criteria for "subsequent encounter" and "nonunion" to justify the code selection.