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v1.0.0
ICD-10 Guide
ICD-10 CodesM46.84

M46.84

Billable

Other specified inflammatory spondylopathies, thoracic region

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

Code Description

ICD-10 M46.84 is a billable code used to indicate a diagnosis of other specified inflammatory spondylopathies, thoracic region.

Key Diagnostic Point:

M46.84 refers to inflammatory spondylopathies that are not classified elsewhere, specifically affecting the thoracic region of the spine. Inflammatory spondylopathies encompass a range of conditions characterized by inflammation of the vertebrae and surrounding structures. This code is particularly relevant for conditions such as ankylosing spondylitis, which primarily affects the axial skeleton and can lead to significant stiffness and pain in the thoracic spine. Spinal stenosis, which may also present with inflammatory features, can contribute to nerve compression and associated symptoms. Clinicians must document the specific inflammatory condition affecting the thoracic spine, as this code captures a broad category of inflammatory processes that may not fit neatly into other classifications. Accurate diagnosis often requires imaging studies, clinical evaluation, and sometimes laboratory tests to identify inflammatory markers. The thoracic region is crucial for respiratory function and overall mobility, making the management of these conditions vital for patient quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying inflammatory conditions that can affect the thoracic spine
  • Need for precise documentation to differentiate from other spondylopathies
  • Potential overlap with other codes related to spinal conditions
  • Variability in clinical presentation and diagnostic criteria

Audit Risk Factors

  • Insufficient documentation of the specific inflammatory condition
  • Failure to include imaging results that support the diagnosis
  • Inconsistent use of terminology in clinical notes
  • Lack of clarity on the patient's history of inflammatory symptoms

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed clinical notes including symptom duration, severity, and response to treatment.

Common Clinical Scenarios

Patients presenting with chronic back pain, stiffness, and inflammatory markers.

Billing Considerations

Consideration of family history of autoimmune diseases and thorough physical examination findings.

Orthopedics

Documentation Requirements

Imaging studies, surgical notes, and detailed descriptions of spinal anatomy affected.

Common Clinical Scenarios

Patients with spinal stenosis presenting with radicular symptoms and inflammatory signs.

Billing Considerations

Documentation of any surgical interventions or conservative management strategies.

Coding Guidelines

Inclusion Criteria

Use M46.84 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include any relevant imaging or lab results that confirm the inflammatory nature of the condition
  • This code should be used when the specific inflammatory spondylopathy does not have a more specific code

Exclusion Criteria

Do NOT use M46.84 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

72148CPT Code

MRI of the spine, thoracic

Clinical Scenario

Used to evaluate inflammatory changes in the thoracic spine.

Documentation Requirements

Indication for MRI must be clearly documented, including symptoms and prior treatments.

Specialty Considerations

Rheumatologists may order this for inflammatory assessment, while orthopedists may use it for surgical planning.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of inflammatory spondylopathies, improving the ability to track and manage these conditions. M46.84 provides a means to capture cases that do not fit into more defined categories, enhancing data accuracy and patient care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of inflammatory spondylopathies, improving the ability to track and manage these conditions. M46.84 provides a means to capture cases that do not fit into more defined categories, enhancing data accuracy and patient care.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of inflammatory spondylopathies, improving the ability to track and manage these conditions. M46.84 provides a means to capture cases that do not fit into more defined categories, enhancing data accuracy and 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

When should I use M46.84 instead of M45?

Use M46.84 when the inflammatory spondylopathy does not meet the criteria for ankylosing spondylitis (M45) or when the specific inflammatory condition affecting the thoracic spine is not otherwise classified.