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ICD-10 Guide
ICD-10 CodesD41.12

D41.12

Billable

Neoplasm of uncertain behavior of left renal pelvis

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

Code Description

ICD-10 D41.12 is a billable code used to indicate a diagnosis of neoplasm of uncertain behavior of left renal pelvis.

Key Diagnostic Point:

A neoplasm of uncertain behavior of the left renal pelvis refers to a growth or tumor located in the renal pelvis of the left kidney that does not exhibit definitive characteristics of malignancy or benignity. These neoplasms can arise from various cell types and may present with nonspecific symptoms such as hematuria (blood in urine), flank pain, or urinary obstruction. The classification as 'uncertain behavior' indicates that the tumor's potential for progression or malignancy is not clearly defined, necessitating careful monitoring and evaluation. Surveillance strategies often include imaging studies such as ultrasound, CT scans, or MRI to assess changes in size or characteristics over time. The management of these neoplasms may involve a multidisciplinary approach, including urologists and oncologists, to determine the best course of action, which may range from active surveillance to surgical intervention depending on the tumor's behavior and patient factors.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Need for ongoing surveillance and monitoring
  • Potential for misclassification with other renal neoplasms
  • Documentation of imaging and follow-up care

Audit Risk Factors

  • Inadequate documentation of tumor characteristics
  • Failure to document follow-up imaging or surveillance
  • Misinterpretation of pathology reports
  • Lack of clarity on the treatment plan

Specialty Focus

Medical Specialties

Urology

Documentation Requirements

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

Common Clinical Scenarios

Patients presenting with hematuria or flank pain, requiring imaging to evaluate for renal masses.

Billing Considerations

Urologists must ensure that all findings are clearly documented to support the diagnosis of neoplasm of uncertain behavior.

Oncology

Documentation Requirements

Comprehensive treatment plans, including surveillance protocols and any interventions performed.

Common Clinical Scenarios

Patients with a known renal mass requiring oncological assessment for potential malignancy.

Billing Considerations

Oncologists should document the rationale for surveillance versus intervention to justify coding.

Coding Guidelines

Inclusion Criteria

Use D41.12 When
  • According to ICD
  • 10 coding guidelines, neoplasms of uncertain behavior are classified under specific categories
  • It is essential to document the behavior of the neoplasm accurately and to follow the guidelines for coding based on the site and behavior of the tumor

Exclusion Criteria

Do NOT use D41.12 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

88305CPT Code

Pathology examination of tissue

Clinical Scenario

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

Documentation Requirements

Pathology report must be included in the patient's medical record.

Specialty Considerations

Urologists and oncologists should ensure that the pathology findings are clearly documented.

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 data collection and reimbursement processes.

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 data collection 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 does 'neoplasm of uncertain behavior' mean?

It refers to a tumor that cannot be definitively classified as benign or malignant, requiring careful monitoring and evaluation.