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ICD-10 Guide
ICD-10 CodesM46.20

M46.20

Billable

Osteomyelitis of vertebra, site unspecified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/17/2025

Code Description

ICD-10 M46.20 is a billable code used to indicate a diagnosis of osteomyelitis of vertebra, site unspecified.

Key Diagnostic Point:

Osteomyelitis of the vertebra refers to an infection of the bone within the spinal column, which can lead to significant morbidity if not diagnosed and treated promptly. This condition can arise from various sources, including hematogenous spread from distant infections, direct extension from adjacent soft tissue infections, or post-surgical complications. The vertebrae are particularly susceptible to infection due to their rich vascular supply and the presence of intervertebral discs. Symptoms may include localized pain, fever, and neurological deficits if the spinal cord or nerve roots are affected. Diagnosis typically involves imaging studies such as MRI or CT scans, which can reveal bone edema, abscess formation, or other changes indicative of infection. Laboratory tests may show elevated inflammatory markers. Treatment often requires a combination of antibiotics and, in some cases, surgical intervention to debride infected tissue. The unspecified site designation indicates that the specific vertebra affected is not documented, which can complicate treatment planning and prognosis.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Unspecified site may lead to ambiguity in treatment and management.
  • Differentiating from other spinal conditions like spondylitis or discitis.
  • Potential for co-existing conditions that complicate the clinical picture.
  • Need for comprehensive documentation to support the diagnosis.

Audit Risk Factors

  • Inadequate documentation of the infection source.
  • Failure to specify the affected vertebra.
  • Lack of supporting imaging or lab results.
  • Misclassification with other spinal conditions.

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed operative notes, imaging studies, and lab results.

Common Clinical Scenarios

Post-operative infections, trauma-related osteomyelitis.

Billing Considerations

Ensure clear documentation of the surgical history and any complications.

Infectious Disease

Documentation Requirements

Comprehensive history of infection, treatment plans, and follow-up notes.

Common Clinical Scenarios

Hematogenous osteomyelitis in patients with systemic infections.

Billing Considerations

Document underlying conditions that may predispose to infection.

Coding Guidelines

Inclusion Criteria

Use M46.20 When
  • According to ICD
  • 10 guidelines, M46
  • 20 should be used when osteomyelitis of the vertebra is confirmed but the specific site is not documented
  • Coders should ensure that the diagnosis is supported by clinical documentation and imaging findings

Exclusion Criteria

Do NOT use M46.20 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used when joint aspiration is performed due to infection.

Documentation Requirements

Document the reason for aspiration and findings.

Specialty Considerations

Orthopedic documentation should include joint stability assessments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of osteomyelitis, improving data accuracy and treatment tracking. M46.20 reflects the need for precise documentation to avoid ambiguity in patient care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of osteomyelitis, improving data accuracy and treatment tracking. M46.20 reflects the need for precise documentation to avoid ambiguity in patient care.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of osteomyelitis, improving data accuracy and treatment tracking. M46.20 reflects the need for precise documentation to avoid ambiguity in patient care.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What should I document to support the use of M46.20?

Document the clinical presentation, imaging findings, laboratory results, and any treatment provided. Ensure that the diagnosis is clearly linked to the patient's symptoms and history.