M84.353 Stress fracture, unspecified femur

Name of the Condition

• Stress Fracture, Unspecified Femur

Summary

A stress fracture of the unspecified femur is a small crack or severe bruising within the femoral bone, typically resulting from repetitive force or overuse. This injury occurs when the bone's ability to repair itself is exceeded by mechanical stress, often affecting weight-bearing structures.

Causes

Stress fractures develop due to repeated mechanical stress on the femur that outpaces the bone's natural repair process. Common causes include increased physical activity, improper training techniques, and inadequate rest between activities.

Risk Factors

• Participation in high-impact sports (e.g., running, jumping)
• Sudden increase in physical activity level
• Poor nutrition, including insufficient calcium or vitamin D
• Low bone density or osteoporosis
• Overuse from repetitive weight-bearing motions

Symptoms

• Pain in the thigh or groin that worsens with activity
• Swelling and tenderness around the fracture site
• Pain that diminishes with rest
• Difficulty bearing weight on the affected leg

Diagnosis

Diagnosis involves a physical examination by a healthcare provider, followed by imaging tests such as X-rays, MRI, or bone scans to confirm the fracture. Early stress fractures may not be visible on standard X-rays.

Treatment Options

• Rest and activity modification to allow bone healing
• Pain management with over-the-counter or prescription medications
• Gradual return to weight-bearing activities as tolerated
• Physical therapy to strengthen surrounding muscles and improve mobility
• Use of supportive devices (e.g., crutches) to reduce weight on the affected leg

Prognosis and Follow-Up

Most stress fractures of the femur heal with proper rest and treatment, though recovery time varies based on fracture severity and individual factors. Follow-up care typically includes monitoring for healing progress and gradual resumption of activities to prevent recurrence. Persistent pain or delayed healing may require further evaluation.

Complications

• Delayed healing or nonunion of the fracture
• Progression to a complete fracture with continued activity
• Chronic pain or functional limitations
• Increased risk of future stress fractures in the same or other bones

Lifestyle & Prevention

• Gradually increase physical activity intensity and duration
• Ensure adequate rest between training sessions
• Maintain a balanced diet rich in calcium and vitamin D
• Wear appropriate footwear and use proper equipment for sports
• Address underlying bone density issues through medical management

When to Seek Professional Help

Seek medical attention if you experience persistent thigh or groin pain, especially with weight-bearing activities, or if pain does not improve with rest. Immediate care is recommended for sudden, severe pain or inability to bear weight, as these may indicate a more serious injury.

Tips for Medical Coders

Document the specific femur involved (e.g., right, left) when known, as this may impact code assignment. For unspecified femur, use M84.353. Ensure clinical documentation supports the diagnosis, including details of imaging findings or physical exam results, to justify code selection.