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ICD-10 Guide
ICD-10 CodesChapter 2: NeoplasmsD42

D42

Billable

Neoplasm of uncertain behavior of meninges

Chapter 2:Neoplasms

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 D42 is a billable code used to indicate a diagnosis of neoplasm of uncertain behavior of meninges.

Key Diagnostic Point:

Neoplasms of uncertain behavior of the meninges are tumors that arise from the protective membranes covering the brain and spinal cord. These neoplasms are classified as having uncertain behavior due to their ambiguous histological characteristics, which do not clearly indicate whether they are benign or malignant. Clinically, they may present with symptoms such as headaches, seizures, or neurological deficits, depending on their size and location. Imaging studies, particularly MRI, are crucial for diagnosis, as they help delineate the tumor's extent and its relationship to surrounding structures. The management of these neoplasms often involves a multidisciplinary approach, including neurosurgery, oncology, and radiation therapy, particularly if there is a concern for progression to malignancy. Regular surveillance through imaging and clinical evaluation is essential to monitor for any changes in behavior or growth, which may necessitate intervention. The prognosis can vary significantly based on the tumor's characteristics and the patient's overall health.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Ambiguity in histological classification
  • Variability in clinical presentation
  • Need for multidisciplinary management
  • Potential for progression to malignancy

Audit Risk Factors

  • Inadequate documentation of tumor behavior
  • Failure to document surveillance protocols
  • Misclassification of tumor type
  • Lack of follow-up notes

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with headaches, seizures, or neurological deficits.

Billing Considerations

Ensure clear documentation of symptoms and imaging findings to support the diagnosis.

Neurosurgery

Documentation Requirements

Operative reports, pathology results, and follow-up care notes.

Common Clinical Scenarios

Surgical intervention for symptomatic neoplasms or those with concerning imaging findings.

Billing Considerations

Document the rationale for surgical intervention and any histological findings post-surgery.

Coding Guidelines

Inclusion Criteria

Use D42 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the tumor's behavior and any associated symptoms
  • Include details of imaging studies and treatment plans

Exclusion Criteria

Do NOT use D42 When
No specific exclusions found.

Related CPT Codes

61510CPT Code

Craniotomy, excision of brain tumor

Clinical Scenario

Used when surgical intervention is required for a meningeal neoplasm.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Neurosurgeons must document the rationale for surgery and any histological findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of neoplasms, improving the accuracy of data collection and reimbursement processes. D42 provides a clearer classification for neoplasms of uncertain behavior, which was less defined in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of neoplasms, improving the accuracy of data collection and reimbursement processes. D42 provides a clearer classification for neoplasms of uncertain behavior, which was less defined in ICD-9.

Reimbursement & Billing Impact

reimbursement processes. D42 provides a clearer classification for neoplasms of uncertain behavior, which was less defined 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 significance of coding D42?

Coding D42 is significant as it indicates a neoplasm of uncertain behavior, which requires careful monitoring and management due to its potential for progression. Accurate coding ensures appropriate treatment and follow-up.