Codes / ICD10CM / M87.275

M87.275 Osteonecrosis due to previous trauma, left foot

ICD10CM code

ICD10CM

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Name of the Condition

  • Osteonecrosis due to previous trauma, left foot
  • Also known as avascular necrosis of the left foot secondary to prior injury.

Summary

Osteonecrosis due to previous trauma, left foot, is a condition where bone tissue in the left foot dies due to disrupted blood flow following an injury. This can lead to pain, joint dysfunction, and potential bone collapse if left untreated.

Causes

The condition results from trauma or injury to the left foot, which damages blood vessels supplying the bone. This disruption in blood flow causes bone tissue death. Common traumatic events include fractures, dislocations, or severe soft tissue damage to the foot.

Risk Factors

  • Severe foot trauma (e.g., fractures, dislocations)
  • High-energy injuries to the foot region
  • Delayed or inadequate treatment of foot injuries
  • Underlying vascular conditions that impair healing

Symptoms

  • Persistent foot pain, especially with movement or weight-bearing
  • Swelling or tenderness around the affected area
  • Limited range of motion in the foot or toes
  • Stiffness or instability in the affected foot
  • Limping (if lower extremities are affected)

Diagnosis

Diagnosis involves a clinical evaluation of the left foot, including a review of trauma history. Imaging tests such as X-rays, MRI, or CT scans are used to assess bone integrity and detect signs of osteonecrosis. Early imaging may be necessary to identify the condition before structural changes occur.

Treatment Options

Treatment focuses on relieving pain, preserving joint function, and preventing further bone damage. Options may include rest, pain management, physical therapy, and in severe cases, surgical interventions like core decompression or joint replacement.

Prognosis and Follow-Up

Prognosis depends on the extent of bone damage and timely intervention. Early diagnosis and treatment can improve outcomes, but advanced cases may lead to permanent joint damage. Regular follow-up with imaging and clinical assessments is typically recommended to monitor progression.

Complications

Potential complications include chronic pain, joint deformity, arthritis, and reduced mobility. In severe cases, bone collapse or the need for surgical intervention may occur.

Lifestyle & Prevention

Avoiding high-impact activities and protecting the foot from further injury can help prevent progression. Maintaining a healthy weight and managing underlying conditions (e.g., diabetes) may support healing and reduce risk.

When to Seek Professional Help

Seek medical attention if persistent foot pain, swelling, or difficulty walking develops after an injury, or if symptoms worsen over time.

Tips for Medical Coders

Document the specific location (left foot) and the causal relationship to prior trauma. Ensure clinical notes support the diagnosis and specify the affected foot to accurately assign M87.275.

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