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v1.0.0
ICD-10 Guide
ICD-10 CodesM46.85

M46.85

Billable

Other specified inflammatory spondylopathies, thoracolumbar region

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

Code Description

ICD-10 M46.85 is a billable code used to indicate a diagnosis of other specified inflammatory spondylopathies, thoracolumbar region.

Key Diagnostic Point:

M46.85 refers to inflammatory spondylopathies that are not classified elsewhere but specifically affect the thoracolumbar region of the spine. This condition encompasses a variety of inflammatory disorders that can lead to pain, stiffness, and potential structural changes in the spine. Inflammatory spondylopathies include conditions such as ankylosing spondylitis, which is characterized by chronic inflammation of the spine and sacroiliac joints, leading to pain and eventual fusion of the vertebrae. Other inflammatory conditions may include reactive arthritis and psoriatic arthritis affecting the spine. The thoracolumbar region is particularly significant as it connects the thoracic and lumbar spine, and inflammation here can severely impact mobility and quality of life. Diagnosis typically involves clinical evaluation, imaging studies, and laboratory tests to identify inflammatory markers. Treatment may include anti-inflammatory medications, physical therapy, and in some cases, surgical intervention. Accurate coding is essential for proper management and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between various types of inflammatory spondylopathies
  • Need for precise documentation of symptoms and imaging findings
  • Potential overlap with other spinal conditions such as ankylosing spondylitis
  • Variability in treatment approaches based on specific inflammatory conditions

Audit Risk Factors

  • Inadequate documentation of inflammatory markers
  • Failure to specify the exact nature of the inflammatory spondylopathy
  • Misclassification of the thoracolumbar region versus other spinal regions
  • Lack of imaging studies to support the diagnosis

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed patient history, physical examination findings, imaging results, and laboratory tests indicating inflammation.

Common Clinical Scenarios

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

Billing Considerations

Ensure that all inflammatory conditions are documented to avoid misclassification.

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Patients requiring surgical intervention for severe spinal stenosis or deformity due to inflammatory spondylopathy.

Billing Considerations

Document the impact of inflammation on spinal structure and function.

Coding Guidelines

Inclusion Criteria

Use M46.85 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include specific details about the inflammatory condition and its impact on the thoracolumbar region

Exclusion Criteria

Do NOT use M46.85 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

72148CPT Code

MRI of the spine, thoracic and lumbar

Clinical Scenario

Used to evaluate inflammatory changes in the thoracolumbar region.

Documentation Requirements

MRI reports and clinical notes indicating the need for imaging.

Specialty Considerations

Rheumatologists and orthopedic surgeons should ensure imaging correlates with clinical findings.

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 accuracy of diagnoses and treatment tracking. M46.85 provides a distinct code for conditions that may have previously been lumped together, enhancing data collection and research opportunities.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of inflammatory spondylopathies, improving the accuracy of diagnoses and treatment tracking. M46.85 provides a distinct code for conditions that may have previously been lumped together, enhancing data collection and research opportunities.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of inflammatory spondylopathies, improving the accuracy of diagnoses and treatment tracking. M46.85 provides a distinct code for conditions that may have previously been lumped together, enhancing data collection and research opportunities.

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 the difference between M46.85 and M45?

M46.85 is used for other specified inflammatory spondylopathies affecting the thoracolumbar region, while M45 specifically refers to ankylosing spondylitis, a well-defined condition.