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v1.0.0
ICD-10 Guide
ICD-10 CodesM48.18

M48.18

Billable

Ankylosing hyperostosis [Forestier], sacral and sacrococcygeal region

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

Code Description

ICD-10 M48.18 is a billable code used to indicate a diagnosis of ankylosing hyperostosis [forestier], sacral and sacrococcygeal region.

Key Diagnostic Point:

Ankylosing hyperostosis, also known as Forestier's disease, is characterized by calcification and ossification of the anterior longitudinal ligament of the spine, leading to stiffness and reduced mobility. This condition primarily affects the sacral and sacrococcygeal regions, resulting in significant discomfort and potential neurological complications due to spinal stenosis. Patients may present with chronic back pain, stiffness, and a limited range of motion, particularly in the lumbar and sacral areas. The condition is often associated with other spondylopathies, including ankylosing spondylitis, which is an inflammatory arthritis affecting the spine and large joints. Diagnosis typically involves imaging studies such as X-rays or MRI, which reveal characteristic changes in the spine. Management may include physical therapy, pain management, and in severe cases, surgical intervention to relieve spinal stenosis or correct deformities. Accurate coding is essential for appropriate treatment and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between ankylosing hyperostosis and other spondylopathies.
  • Understanding the relationship with inflammatory spine conditions.
  • Identifying the specific anatomical regions affected.
  • Navigating the nuances of associated conditions like spinal stenosis.

Audit Risk Factors

  • Inadequate documentation of clinical findings.
  • Failure to specify the affected anatomical regions.
  • Misclassification with other spondylopathies.
  • Lack of imaging studies to support diagnosis.

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed clinical history, physical examination findings, and imaging results.

Common Clinical Scenarios

Patients presenting with chronic back pain and stiffness, particularly in younger adults.

Billing Considerations

Documentation must clearly differentiate between inflammatory and degenerative conditions.

Orthopedics

Documentation Requirements

Surgical notes, pre-operative assessments, and post-operative follow-ups.

Common Clinical Scenarios

Patients requiring surgical intervention for spinal stenosis or deformity correction.

Billing Considerations

Accurate coding of surgical procedures in relation to the diagnosis is crucial.

Coding Guidelines

Inclusion Criteria

Use M48.18 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation and imaging studies
  • Include any relevant co
  • morbidities and specify the anatomical site affected

Exclusion Criteria

Do NOT use M48.18 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

22551CPT Code

Spinal fusion, anterior or anterolateral approach

Clinical Scenario

Used in cases where spinal stenosis due to hyperostosis requires surgical intervention.

Documentation Requirements

Pre-operative imaging, surgical notes, and post-operative assessments.

Specialty Considerations

Orthopedic surgeons must document the rationale for surgery and the expected outcomes.

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 M48.18, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like M48.18, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like M48.18, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

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 primary difference between M48.18 and M45?

M48.18 specifically refers to ankylosing hyperostosis, while M45 encompasses a broader category of ankylosing spondylitis, which includes inflammatory components.