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v1.0.0
ICD-10 Guide
ICD-10 CodesD38.4

D38.4

Billable

Neoplasm of uncertain behavior of thymus

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

Code Description

ICD-10 D38.4 is a billable code used to indicate a diagnosis of neoplasm of uncertain behavior of thymus.

Key Diagnostic Point:

Neoplasms of uncertain behavior of the thymus are tumors that do not exhibit definitive characteristics of malignancy or benignity. These tumors may arise from thymic tissue and can present with a variety of symptoms, including chest pain, cough, or respiratory distress, depending on their size and location. The behavior of these neoplasms is classified as uncertain due to the lack of clear histological features that would categorize them as benign or malignant. Surveillance is critical, as some of these neoplasms may progress to malignancy over time. Regular imaging studies and clinical evaluations are essential to monitor changes in size or symptoms. The management of these neoplasms often involves a multidisciplinary approach, including oncologists, thoracic surgeons, and radiologists, to determine the best course of action, which may include surgical intervention, observation, or further diagnostic testing. The uncertainty surrounding these tumors necessitates careful documentation and coding to ensure appropriate treatment and follow-up.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in histological classification
  • Need for ongoing surveillance and monitoring
  • Potential for progression to malignancy
  • Multidisciplinary management approach

Audit Risk Factors

  • Inadequate documentation of tumor behavior
  • Failure to document surveillance findings
  • Misclassification of neoplasm type
  • Lack of clarity in treatment plans

Specialty Focus

Medical Specialties

Oncology

Documentation Requirements

Detailed pathology reports, imaging studies, and treatment plans.

Common Clinical Scenarios

Initial diagnosis of thymic neoplasm, follow-up imaging for growth assessment.

Billing Considerations

Ensure clear documentation of tumor behavior and any changes over time.

Thoracic Surgery

Documentation Requirements

Operative reports, pre-operative assessments, and post-operative follow-ups.

Common Clinical Scenarios

Surgical intervention for symptomatic thymic neoplasms, evaluation of resected specimens.

Billing Considerations

Document the rationale for surgical intervention and any findings during surgery.

Coding Guidelines

Inclusion Criteria

Use D38.4 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the neoplasm's behavior and any associated symptoms
  • Include relevant imaging and pathology reports to support the diagnosis

Exclusion Criteria

Do NOT use D38.4 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

38500CPT Code

Biopsy of thymus

Clinical Scenario

Used when a biopsy is performed to determine the nature of the thymic neoplasm.

Documentation Requirements

Pathology report and clinical notes detailing the indication for biopsy.

Specialty Considerations

Ensure the biopsy is linked to the diagnosis of uncertain behavior.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of neoplasms, including those of uncertain behavior, which enhances the ability to track and manage these conditions effectively.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of neoplasms, including those of uncertain behavior, which enhances the ability to track and manage these conditions effectively.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of neoplasms, including those of uncertain behavior, which enhances the ability to track and manage these conditions effectively.

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 D38.4?

Coding D38.4 is significant as it reflects the uncertainty in the behavior of the thymic neoplasm, which requires careful monitoring and management. Accurate coding ensures appropriate treatment and follow-up.