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ICD-10 Guide
ICD-10 CodesS13.100

S13.100

Billable

Subluxation of unspecified cervical vertebrae

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 S13.100 is a billable code used to indicate a diagnosis of subluxation of unspecified cervical vertebrae.

Key Diagnostic Point:

Subluxation of the cervical vertebrae refers to a partial dislocation where the vertebrae are misaligned but not completely dislocated. This condition can result from trauma, such as a fall, motor vehicle accident, or sports injury, leading to neck pain, restricted movement, and neurological symptoms if spinal nerves are affected. The cervical spine consists of seven vertebrae (C1-C7), and subluxation can occur at any level. Symptoms may include pain, stiffness, and in severe cases, neurological deficits. Diagnosis typically involves a thorough clinical examination, imaging studies such as X-rays or MRI to assess vertebral alignment and rule out other injuries. Management may include conservative treatment like physical therapy, chiropractic adjustments, or in some cases, surgical intervention to stabilize the spine. Complications can arise if the subluxation leads to nerve compression, resulting in chronic pain or neurological impairment.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Need for precise documentation of the mechanism of injury
  • Differentiation from other cervical spine injuries
  • Potential for associated neurological conditions

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to specify the level of cervical vertebrae involved
  • Misclassification of the severity of the injury
  • Inconsistent coding of associated neurological symptoms

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Documentation must include a detailed account of the injury mechanism, patient symptoms, and initial assessment findings.

Common Clinical Scenarios

Patients presenting with neck pain after a fall or motor vehicle accident.

Billing Considerations

Ensure that all neurological assessments are documented to support the diagnosis.

Surgery

Documentation Requirements

Operative reports must detail the surgical approach, findings, and any corrective measures taken.

Common Clinical Scenarios

Surgical intervention for severe subluxation with neurological compromise.

Billing Considerations

Document any pre-existing conditions that may affect surgical outcomes.

Coding Guidelines

Inclusion Criteria

Use S13.100 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the injury mechanism, location, and any associated conditions
  • Use additional codes for complications or related injuries as necessary

Exclusion Criteria

Do NOT use S13.100 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

72040CPT Code

X-ray cervical spine

Clinical Scenario

Used to confirm diagnosis of cervical subluxation

Documentation Requirements

Document the reason for imaging and findings.

Specialty Considerations

Ensure imaging is justified based on clinical presentation.

22551CPT Code

Cervical spine fusion

Clinical Scenario

Surgical intervention for severe subluxation

Documentation Requirements

Operative report must detail the procedure and indications.

Specialty Considerations

Document any pre-existing conditions affecting surgical outcomes.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of cervical spine injuries, improving the accuracy of diagnosis and treatment tracking. S13.100 provides a clear designation for subluxation, which was less specific in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of cervical spine injuries, improving the accuracy of diagnosis and treatment tracking. S13.100 provides a clear designation for subluxation, which was less specific in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of cervical spine injuries, improving the accuracy of diagnosis and treatment tracking. S13.100 provides a clear designation for subluxation, which was less specific in ICD-9.

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 subluxation and dislocation?

Subluxation refers to a partial dislocation where the joint surfaces are misaligned but still in contact, while dislocation is a complete separation of the joint surfaces.

How is subluxation diagnosed?

Diagnosis is typically made through clinical evaluation and imaging studies such as X-rays or MRI to assess vertebral alignment.