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ICD-10 Guide
ICD-10 CodesD39.12

D39.12

Billable

Neoplasm of uncertain behavior of left ovary

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

Code Description

ICD-10 D39.12 is a billable code used to indicate a diagnosis of neoplasm of uncertain behavior of left ovary.

Key Diagnostic Point:

D39.12 refers to a neoplasm of uncertain behavior located in the left ovary. Neoplasms of uncertain behavior are tumors that do not clearly fall into benign or malignant categories, making their management and prognosis challenging. These tumors may exhibit atypical cellular features, but they lack definitive characteristics that would classify them as malignant. Surveillance is critical for these neoplasms, as they may progress to malignancy over time. Regular imaging studies, such as ultrasound or MRI, and follow-up evaluations are essential to monitor any changes in size or characteristics. The clinical approach often involves a multidisciplinary team, including gynecologists, oncologists, and pathologists, to determine the best course of action, which may include surgical intervention or continued observation. The uncertainty surrounding these neoplasms necessitates thorough documentation and careful coding to ensure accurate representation of the patient's condition and treatment plan.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Ambiguity in diagnosis due to uncertain behavior
  • Need for detailed documentation to support coding
  • Potential for progression to malignancy requiring ongoing surveillance
  • Variability in clinical management approaches

Audit Risk Factors

  • Inadequate documentation of tumor characteristics
  • Failure to document follow-up and surveillance plans
  • Misclassification of neoplasm behavior
  • Lack of multidisciplinary team involvement in management

Specialty Focus

Medical Specialties

Gynecology

Documentation Requirements

Detailed pathology reports, imaging studies, and treatment plans must be documented.

Common Clinical Scenarios

Patients presenting with incidental findings on imaging, abnormal pelvic exams, or unexplained abdominal symptoms.

Billing Considerations

Ensure that all findings are clearly documented to support the diagnosis of uncertain behavior.

Oncology

Documentation Requirements

Comprehensive treatment plans, including surgical notes and follow-up care.

Common Clinical Scenarios

Management of patients with neoplasms that require monitoring for potential malignancy.

Billing Considerations

Collaboration with pathology for accurate classification and ongoing assessment of tumor behavior.

Coding Guidelines

Inclusion Criteria

Use D39.12 When
  • Follow ICD
  • CM guidelines for neoplasms, ensuring accurate documentation of the tumor's behavior and location
  • Include any relevant imaging or pathology reports to support the diagnosis

Exclusion Criteria

Do NOT use D39.12 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

58661CPT Code

Laparoscopy, surgical, with or without biopsy

Clinical Scenario

Used when a neoplasm of uncertain behavior is surgically evaluated.

Documentation Requirements

Surgical notes must detail the procedure and findings.

Specialty Considerations

Gynecological oncology may require additional documentation for tumor staging.

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, improving the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of neoplasms, including those of uncertain behavior, improving the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of neoplasms, including those of uncertain behavior, improving the accuracy of patient records and treatment plans.

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 does 'neoplasm of uncertain behavior' mean?

It refers to tumors that do not have clear characteristics to classify them as benign or malignant, requiring careful monitoring and evaluation.