S72.045K Nondisplaced fracture of base of neck of left femur, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced fracture of base of neck of left femur, subsequent encounter for closed fracture with nonunion (S72.045K)

Summary

This condition involves a break in the upper portion of the left femur (thigh bone) at the base of the femoral neck, near the hip joint. The term "nondisplaced" indicates that the bone fragments remain in their normal anatomical position. The "subsequent encounter" modifier signifies that this is a follow-up visit for a previously treated fracture, and "nonunion" refers to the failure of the bone to heal properly after an expected period. This type of fracture requires ongoing evaluation to assess healing and guide 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 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)
• Smoking or poor nutrition, which can impair bone healing
• Certain medical conditions (e.g., diabetes, vascular disease) that affect circulation

Symptoms

• Persistent hip or groin pain, often worsening with activity
• 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 tissue viability. Review of prior treatment history and healing progress is essential.

Treatment Options

• Immobilization with a brace or cast to stabilize the fracture
• Surgical intervention, such as internal fixation or bone grafting, to promote healing
• Physical therapy to restore strength and mobility
• Pain management with medications or other modalities
• Nutritional support or supplements to aid bone healing
• Addressing underlying conditions (e.g., osteoporosis) to prevent further issues

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion, overall health, and response to treatment. Follow-up care is critical to monitor healing and adjust management as needed. Regular imaging and clinical assessments help track progress. Long-term outcomes may include reduced mobility or chronic pain if healing is incomplete.

Complications

• Chronic pain or discomfort
• Reduced mobility or functional impairment
• Increased risk of future fractures
• Potential need for additional surgery
• Infection or other complications related to treatment
• Long-term disability in severe cases

Lifestyle & Prevention

• Maintain a balanced 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 fall or injury risk
• Use assistive devices (e.g., canes, walkers) if balance is impaired
• Quit smoking and limit alcohol consumption, which can weaken bones
• Follow post-treatment guidelines to optimize healing

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, inability to bear weight, or signs of infection (e.g., fever, redness, drainage). Contact your healthcare provider if symptoms worsen or do not improve with treatment, or if you notice new or worsening swelling, bruising, or deformity.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Include details about the fracture's location (base of neck of left femur), displacement status (nondisplaced), and the presence of nonunion. Ensure documentation supports the "subsequent encounter" modifier and clarifies that the fracture remains closed (no skin breach). Note any treatments or evaluations performed to address the nonunion.