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v1.0.0
ICD-10 Guide
DiagnosesMultiple Lung Nodule

Multiple Lung Nodule

ICD-10 Coding for Multiple Lung Nodules(R91.8, C34.XX)

PRIMARY SPECIALTYPulmonology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Multiple Lung Nodule?
Essential facts and insights about Multiple Lung Nodules

Key Clinical Considerations:

  • Cough, chest pain, or dyspnea
  • Chest X-ray showing multiple nodules, CT scan for characterization
  • Diminished breath sounds, wheezing, or abnormal lung auscultation

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history, imaging results, and clinical findings
  • ICD-10 terminology for lung nodules (e.g., D84.89 for multiple lung nodules)
  • Examples: 'Patient presents with multiple lung nodules on CT scan, no signs of malignancy.'

Coding Guidelines

Usage Guidelines & Examples

  • Usage guidelines: Use R91.1 for solitary nodules, R91.8 for multiple or nonspecific findings.
  • Common errors: Misclassifying nodules as malignant without definitive diagnosis.

Code Exclusions

Important Exclusions

  • Benign tumors, metastatic disease, and other lung pathologies
  • Alternative codes for specific conditions like lung cancer or infections

Related ICD-10 Codes

Primary Codes
R91.1
Solitary pulmonary nodule
R91.8
Other nonspecific abnormal findings on imaging of lung
Ancillary Codes
Z85.118
Z72.0
Differential Codes
R91.1
R91.1
for a single nodule;
R91.8
for multiple.
R91.8
R91.8
for non-malignant findings.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Pulmonology

Specialty Applications

  • Patients with suspected lung cancer, infectious diseases, or autoimmune conditions
  • Pulmonology clinics, hospitals, and radiology departments

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

Documentation requirements?

Include imaging reports, clinical assessment, and follow-up plans.

Billing considerations?

Ensure accurate coding to reflect the complexity of the case and any associated procedures.