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ICD-10 Guide
ICD-10 CodesM46.04

M46.04

Billable

Spinal enthesopathy, thoracic region

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

Code Description

ICD-10 M46.04 is a billable code used to indicate a diagnosis of spinal enthesopathy, thoracic region.

Key Diagnostic Point:

Spinal enthesopathy refers to a condition characterized by inflammation and degeneration at the sites where tendons and ligaments attach to the vertebrae in the thoracic region of the spine. This condition can be associated with various inflammatory spine diseases, including ankylosing spondylitis, which is a type of spondyloarthritis that primarily affects the spine and the sacroiliac joints. Patients may present with chronic back pain, stiffness, and reduced spinal mobility. The thoracic region is particularly significant as it houses vital structures and can impact respiratory function if severely affected. Spinal enthesopathy can also be a component of broader inflammatory conditions, such as psoriatic arthritis or reactive arthritis, and may coexist with spinal stenosis, where narrowing of the spinal canal leads to nerve compression. Accurate diagnosis often requires imaging studies, such as MRI or CT scans, to visualize inflammation and structural changes in the thoracic spine. Treatment typically involves anti-inflammatory medications, physical therapy, and in some cases, surgical intervention if conservative measures fail.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between enthesopathy and other spinal conditions like spondylosis or stenosis.
  • Need for comprehensive documentation of symptoms and imaging findings.
  • Potential overlap with other inflammatory conditions requiring careful coding.
  • Variability in clinical presentation among patients.

Audit Risk Factors

  • Inadequate documentation of the specific thoracic involvement.
  • Failure to link symptoms to the diagnosis appropriately.
  • Misclassification of enthesopathy as a non-inflammatory condition.
  • Lack of imaging studies to support the diagnosis.

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed history of symptoms, physical examination findings, and imaging results.

Common Clinical Scenarios

Patients presenting with chronic back pain, stiffness, and a family history of inflammatory diseases.

Billing Considerations

Documentation should clearly outline the inflammatory nature of the condition and any systemic involvement.

Orthopedics

Documentation Requirements

Surgical notes, imaging studies, and pre-operative assessments.

Common Clinical Scenarios

Patients requiring surgical intervention for spinal stenosis or severe enthesopathy.

Billing Considerations

Ensure that the surgical rationale is well-documented, linking it to the diagnosis of enthesopathy.

Coding Guidelines

Inclusion Criteria

Use M46.04 When
  • According to ICD
  • 10 guidelines, M46
  • 04 should be used when there is clear documentation of spinal enthesopathy localized to the thoracic region
  • It is essential to include any relevant imaging findings and clinical symptoms that support the diagnosis

Exclusion Criteria

Do NOT use M46.04 When
  • Exclusions include conditions that do not involve enthesopathy or are not localized to the thoracic spine

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

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

Clinical Scenario

Used when injecting corticosteroids into the thoracic spine area.

Documentation Requirements

Document the indication for the procedure and the specific site of injection.

Specialty Considerations

Rheumatologists should ensure that the procedure is linked to the diagnosis of enthesopathy.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like spinal enthesopathy, improving the accuracy of data collection and reimbursement processes. This specificity helps in better tracking of disease prevalence and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like spinal enthesopathy, improving the accuracy of data collection and reimbursement processes. This specificity helps in better tracking of disease prevalence and treatment outcomes.

Reimbursement & Billing Impact

reimbursement processes. This specificity helps in better tracking of disease prevalence and treatment outcomes.

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 is spinal enthesopathy?

Spinal enthesopathy is an inflammatory condition affecting the sites where tendons and ligaments attach to the spine, particularly in the thoracic region, leading to pain and functional impairment.