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ICD-10 Guide
ICD-10 CodesC34.91

C34.91

Billable

Malignant neoplasm of unspecified part of right bronchus or lung

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

Code Description

ICD-10 C34.91 is a billable code used to indicate a diagnosis of malignant neoplasm of unspecified part of right bronchus or lung.

Key Diagnostic Point:

C34.91 refers to a malignant neoplasm located in the right bronchus or lung, where the specific site is not further specified. Lung cancer is a leading cause of cancer-related mortality worldwide, often associated with risk factors such as smoking, environmental pollutants, and genetic predispositions. The diagnosis typically involves imaging studies like chest X-rays or CT scans, followed by biopsy for histological confirmation. Staging of lung cancer is crucial for determining prognosis and treatment options, commonly using the TNM classification system, which assesses tumor size (T), lymph node involvement (N), and metastasis (M). Molecular markers, such as EGFR mutations and ALK rearrangements, play a significant role in targeted therapies. Treatment algorithms may include surgery, chemotherapy, radiation therapy, and immunotherapy, depending on the stage and specific characteristics of the tumor. Accurate coding is essential for appropriate reimbursement and tracking of cancer treatment outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in staging and treatment protocols
  • Need for precise documentation of tumor characteristics
  • Potential for multiple co-existing conditions
  • Interpretation of imaging and pathology reports

Audit Risk Factors

  • Inadequate documentation of smoking history
  • Failure to document staging details
  • Misclassification of tumor type or location
  • Lack of supporting pathology reports

Specialty Focus

Medical Specialties

Oncology

Documentation Requirements

Detailed pathology reports, imaging studies, treatment plans, and follow-up notes.

Common Clinical Scenarios

Diagnosis and management of lung cancer, staging assessments, and treatment planning.

Billing Considerations

Ensure accurate documentation of molecular testing results and treatment responses.

Pulmonology

Documentation Requirements

Pulmonary function tests, imaging results, and clinical assessments.

Common Clinical Scenarios

Evaluation of lung function in patients with lung cancer and management of respiratory symptoms.

Billing Considerations

Document any comorbid respiratory conditions that may affect treatment.

Coding Guidelines

Inclusion Criteria

Use C34.91 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the diagnosis, staging, and treatment
  • Include any relevant history, such as smoking status and previous treatments

Exclusion Criteria

Do NOT use C34.91 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

32551CPT Code

Thoracentesis, needle drainage of pleural effusion

Clinical Scenario

Used in patients with lung cancer presenting with pleural effusion.

Documentation Requirements

Document indication for procedure, imaging guidance, and patient consent.

Specialty Considerations

Pulmonologists should ensure accurate coding based on the patient's lung cancer status.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of lung cancer, improving data accuracy and facilitating better tracking of treatment outcomes and epidemiological studies.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of lung cancer, improving data accuracy and facilitating better tracking of treatment outcomes and epidemiological studies.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of lung cancer, improving data accuracy and facilitating better tracking of treatment outcomes and epidemiological studies.

Resources

Clinical References

  • •
    American Cancer Society - Lung Cancer

Coding & Billing References

  • •
    American Cancer Society - Lung Cancer

Frequently Asked Questions

What is the significance of staging in lung cancer?

Staging is crucial as it determines the extent of cancer spread, guides treatment options, and helps predict prognosis.