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ICD-10 Guide
ICD-10 CodesS12.121

S12.121

Billable

Other nondisplaced dens fracture

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

Code Description

ICD-10 S12.121 is a billable code used to indicate a diagnosis of other nondisplaced dens fracture.

Key Diagnostic Point:

A nondisplaced dens fracture refers to a fracture of the odontoid process (dens) of the second cervical vertebra (C2) that does not result in displacement of the bone fragments. This type of fracture is often caused by trauma, such as a fall or motor vehicle accident, where the head is suddenly forced forward or backward, leading to hyperextension or hyperflexion injuries. Clinically, patients may present with neck pain, limited range of motion, and neurological symptoms if there is spinal cord involvement. Diagnosis typically involves imaging studies, such as X-rays or CT scans, to confirm the presence and type of fracture. Management may include conservative treatment with immobilization in a cervical collar or, in some cases, surgical intervention if instability is present. Complications can include nonunion of the fracture, neurological deficits, and chronic pain. Accurate coding is essential for proper reimbursement and to reflect the severity of the injury.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between displaced and nondisplaced fractures
  • Understanding the anatomical location and implications of dens fractures
  • Variability in clinical presentation and management approaches
  • Need for precise documentation of mechanism of injury

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to specify the type of fracture (nondisplaced vs. displaced)
  • Misinterpretation of imaging results leading to incorrect coding
  • Lack of follow-up documentation on treatment outcomes

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Complete documentation of initial assessment, imaging results, and treatment plan.

Common Clinical Scenarios

Patients presenting with acute neck pain after trauma, requiring imaging and possible cervical collar application.

Billing Considerations

Ensure that the mechanism of injury is clearly documented to support the diagnosis.

Surgery

Documentation Requirements

Detailed operative notes, including indications for surgery and post-operative care.

Common Clinical Scenarios

Surgical intervention for unstable fractures or nonunion cases.

Billing Considerations

Document any intraoperative findings that may affect coding, such as additional injuries.

Coding Guidelines

Inclusion Criteria

Use S12.121 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code accurately reflects the clinical scenario, including the type of fracture and any associated injuries

Exclusion Criteria

Do NOT use S12.121 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

22551CPT Code

Anterior cervical discectomy and fusion

Clinical Scenario

Used in cases where surgical intervention is necessary for stabilization.

Documentation Requirements

Operative report detailing the procedure and indications.

Specialty Considerations

Ensure that the surgical necessity is well-documented to support the procedure.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of fractures, including nondisplaced dens fractures, improving the accuracy of clinical data and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of fractures, including nondisplaced dens fractures, improving the accuracy of clinical data and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

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 a displaced and nondisplaced dens fracture?

A displaced dens fracture involves a separation of the fracture fragments, which can lead to instability and potential spinal cord injury, while a nondisplaced fracture means the bone fragments remain aligned.