ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesM46.90

M46.90

Billable

Unspecified inflammatory spondylopathy, site unspecified

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

Code Description

ICD-10 M46.90 is a billable code used to indicate a diagnosis of unspecified inflammatory spondylopathy, site unspecified.

Key Diagnostic Point:

Unspecified inflammatory spondylopathy refers to a group of inflammatory conditions affecting the spine that do not have a specific site of involvement documented. This condition can manifest as pain, stiffness, and reduced mobility in the spine due to inflammation of the vertebrae and surrounding tissues. It is often associated with autoimmune diseases, such as ankylosing spondylitis, which primarily affects the sacroiliac joints and can lead to fusion of the spine over time. Inflammatory spondylopathies can also be linked to other conditions like spinal stenosis, where narrowing of the spinal canal occurs, leading to nerve compression and pain. Diagnosis typically involves clinical evaluation, imaging studies, and laboratory tests to rule out other causes of back pain. The unspecified nature of this code indicates that the specific site of inflammation has not been identified, which can complicate treatment and management strategies. Accurate coding is essential for appropriate reimbursement and to ensure that patients receive the necessary care for their inflammatory spine conditions.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Lack of specificity regarding the site of inflammation
  • Potential overlap with other inflammatory spine conditions
  • Need for comprehensive clinical documentation to support the diagnosis
  • Variability in presentation and symptoms among patients

Audit Risk Factors

  • Insufficient documentation of symptoms and clinical findings
  • Failure to specify the site of inflammation
  • Inconsistent coding practices across providers
  • Lack of follow-up documentation to support ongoing treatment

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed clinical notes including patient history, physical examination findings, and imaging results.

Common Clinical Scenarios

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

Billing Considerations

Rheumatologists should ensure that all relevant autoimmune markers are documented to support the diagnosis.

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Patients with spinal stenosis or other degenerative changes requiring surgical intervention.

Billing Considerations

Orthopedic surgeons should differentiate between inflammatory and degenerative conditions to avoid coding errors.

Coding Guidelines

Inclusion Criteria

Use M46.90 When
  • According to ICD
  • 10 coding guidelines, M46
  • 90 should be used when the specific site of inflammatory spondylopathy is not documented
  • Coders should ensure that all relevant clinical information is captured to support the use of this code

Exclusion Criteria

Do NOT use M46.90 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

72148CPT Code

MRI of the spine, without contrast

Clinical Scenario

Used to evaluate the extent of inflammation in the spine.

Documentation Requirements

MRI report must indicate findings consistent with inflammatory changes.

Specialty Considerations

Rheumatologists should correlate MRI findings with clinical symptoms for accurate diagnosis.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more detailed coding of inflammatory spine conditions, enabling better tracking of disease prevalence and treatment outcomes. M46.90 serves as a catch-all for unspecified cases, but it is essential to strive for more specific coding when possible.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more detailed coding of inflammatory spine conditions, enabling better tracking of disease prevalence and treatment outcomes. M46.90 serves as a catch-all for unspecified cases, but it is essential to strive for more specific coding when possible.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more detailed coding of inflammatory spine conditions, enabling better tracking of disease prevalence and treatment outcomes. M46.90 serves as a catch-all for unspecified cases, but it is essential to strive for more specific coding when possible.

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 M46.90?

M46.90 should be used when there is documentation of inflammatory spondylopathy but no specific site of involvement is identified. Ensure that all clinical details are captured to support this diagnosis.