M46.37 Infection of intervertebral disc (pyogenic), lumbosacral region

Name of the Condition

• Infection of Intervertebral Disc (Pyogenic), Lumbosacral Region

Summary

Infection of the intervertebral disc (pyogenic), lumbosacral region, is a bacterial infection affecting the intervertebral disc and adjacent structures in the lower spine. This condition involves inflammation and infection of the disc space, potentially leading to pain, structural damage, and systemic symptoms. It is a serious spinal infection that requires prompt medical attention.

Causes

Pyogenic disc infection in the lumbosacral region is typically caused by bacterial pathogens, such as Staphylococcus aureus or Streptococcus species. The infection may enter the disc space through hematogenous spread (via the bloodstream) or direct inoculation, often following trauma, surgery, or invasive procedures. The inflammatory response can result in disc destruction and spread to adjacent tissues.

Risk Factors

• Recent spinal surgery or invasive procedures in the lumbosacral region.
• Immunocompromised states (e.g., diabetes, HIV, or chronic steroid use).
• Intravenous drug use.
• Pre-existing spinal conditions or trauma affecting the lumbosacral area.
• Advanced age.

Symptoms

• Severe, localized lower back pain that worsens with movement.
• Fever, chills, or other systemic signs of infection.
• Reduced spinal mobility or stiffness in the lower back.
• Possible radiating pain to the legs if nerve roots are involved.
• Neurological symptoms (e.g., weakness or numbness) in severe cases.

Diagnosis

Diagnosis is based on clinical evaluation, imaging (e.g., MRI or CT), and laboratory testing. Clinical assessment includes evaluating pain patterns, systemic symptoms, and neurological function. Imaging helps visualize disc space infection and structural changes, while laboratory tests (e.g., blood cultures, inflammatory markers) confirm bacterial involvement.

Treatment Options

Treatment typically involves antibiotics to target the bacterial infection, often administered intravenously initially, followed by oral therapy. In severe cases, surgical intervention may be necessary to drain abscesses or stabilize the spine. Pain management and physical therapy may also be part of the recovery process.

Prognosis and Follow-Up

Prognosis depends on early diagnosis and treatment. With prompt intervention, many patients recover fully, but delayed treatment can lead to chronic pain or spinal instability. Follow-up care includes monitoring for recurrence, assessing spinal function, and adjusting treatment as needed.

Complications

• Spinal instability or deformity.
• Chronic pain.
• Neurological deficits (e.g., weakness, numbness).
• Spread of infection to adjacent tissues or bloodstream (sepsis).
• Recurrence of infection.

Lifestyle & Prevention

• Maintain good spinal health through regular exercise and proper posture.
• Avoid invasive spinal procedures unless necessary.
• Manage chronic conditions (e.g., diabetes) to reduce infection risk.
• Practice good hygiene to prevent bacterial infections.
• Seek prompt treatment for spinal injuries or infections.

When to Seek Professional Help

Seek immediate medical attention if you experience severe lower back pain, fever, or neurological symptoms (e.g., leg weakness, numbness). Early evaluation is critical to prevent complications and improve outcomes.

Tips for Medical Coders

Document the specific lumbosacral region involvement to support the M46.37 code. Include details on infection source (e.g., hematogenous, post-procedural) and clinical findings (e.g., imaging results, lab confirmation) to ensure accurate coding and billing.