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ICD-10 Guide
ICD-10 CodesD44.9

D44.9

Billable

Neoplasm of uncertain behavior of unspecified endocrine gland

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

Code Description

ICD-10 D44.9 is a billable code used to indicate a diagnosis of neoplasm of uncertain behavior of unspecified endocrine gland.

Key Diagnostic Point:

D44.9 refers to a neoplasm of uncertain behavior originating from an unspecified endocrine gland. 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 features that warrant careful monitoring and further investigation. The endocrine system comprises glands that secrete hormones directly into the bloodstream, influencing various bodily functions. When a neoplasm arises in this system, it can potentially disrupt hormonal balance, leading to a range of clinical symptoms. Surveillance is critical for these neoplasms, as they may progress to malignancy or remain stable over time. Regular imaging studies, laboratory tests, and clinical evaluations are essential to assess changes in the tumor's behavior. The uncertainty surrounding these neoplasms necessitates a multidisciplinary approach involving endocrinologists, oncologists, and pathologists to determine the most appropriate management strategy.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Uncertainty in behavior classification (benign vs malignant)
  • Need for comprehensive documentation of clinical findings
  • Potential for progression requiring ongoing surveillance
  • Variability in treatment approaches based on tumor behavior

Audit Risk Factors

  • Inadequate documentation of tumor characteristics
  • Failure to specify the endocrine gland involved
  • Lack of follow-up documentation for surveillance
  • Misclassification of neoplasm behavior

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Detailed clinical notes on hormonal assessments, imaging results, and follow-up plans.

Common Clinical Scenarios

Patients presenting with abnormal hormone levels and imaging findings suggestive of a neoplasm.

Billing Considerations

Endocrinologists must document the rationale for surveillance and any changes in clinical status.

Oncology

Documentation Requirements

Comprehensive treatment plans, pathology reports, and follow-up evaluations.

Common Clinical Scenarios

Patients with neoplasms requiring potential intervention or monitoring for progression.

Billing Considerations

Oncologists should ensure clear communication of tumor behavior and treatment decisions.

Coding Guidelines

Inclusion Criteria

Use D44.9 When
  • According to ICD
  • 10 coding guidelines, D44
  • 9 should be used when the neoplasm's behavior is uncertain and the specific endocrine gland is not identified
  • Coders must ensure that the documentation supports the diagnosis and reflects the need for surveillance

Exclusion Criteria

Do NOT use D44.9 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

88305CPT Code

Pathology examination, surgical

Clinical Scenario

Used when a biopsy is performed to evaluate the neoplasm.

Documentation Requirements

Pathology report must clearly indicate findings and recommendations.

Specialty Considerations

Endocrinologists and oncologists should collaborate on pathology 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, including those of uncertain behavior. D44.9 provides a clear classification for neoplasms that do not fit neatly into benign or malignant categories, facilitating better tracking and management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of neoplasms, including those of uncertain behavior. D44.9 provides a clear classification for neoplasms that do not fit neatly into benign or malignant categories, facilitating better tracking and management.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of neoplasms, including those of uncertain behavior. D44.9 provides a clear classification for neoplasms that do not fit neatly into benign or malignant categories, facilitating better tracking and management.

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 cannot be definitively classified as benign or malignant based on current clinical and pathological information. These tumors require careful monitoring to assess their behavior over time.