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v1.0.0
ICD-10 Guide
ICD-10 CodesQ33.1

Q33.1

Billable

Accessory lobe of lung

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 Q33.1 is a billable code used to indicate a diagnosis of accessory lobe of lung.

Key Diagnostic Point:

An accessory lobe of the lung is a congenital malformation characterized by the presence of an additional lobe in one or both lungs. This condition can arise due to abnormal lung development during embryogenesis, leading to variations in lung structure. Accessory lobes may be asymptomatic or can present with respiratory issues depending on their size and location. In some cases, they may be associated with other congenital anomalies, particularly those affecting the respiratory system, such as tracheoesophageal fistula or lung hypoplasia. Diagnosis is typically made through imaging studies such as chest X-rays or CT scans, which can reveal the presence of the accessory lobe. Management may vary from observation to surgical intervention, depending on the clinical presentation and associated complications. Understanding the implications of this condition is crucial for pediatric patients, as it may affect their respiratory function and overall health.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Potential association with other congenital anomalies
  • Need for precise imaging interpretation
  • Differentiation from other lung conditions

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to report associated congenital anomalies
  • Misinterpretation of imaging results
  • Inconsistent coding of respiratory symptoms

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Detailed clinical history, physical examination findings, and imaging results are essential for accurate coding.

Common Clinical Scenarios

Pediatric patients presenting with respiratory distress or recurrent infections may require evaluation for congenital lung anomalies.

Billing Considerations

Coders should be aware of the developmental implications of accessory lobes in children and their potential impact on growth and respiratory health.

Genetics

Documentation Requirements

Genetic testing results and family history should be documented to assess for syndromic associations.

Common Clinical Scenarios

Genetic counseling may be necessary for families with a history of congenital lung malformations.

Billing Considerations

Consideration of chromosomal abnormalities that may co-occur with congenital lung conditions is crucial for comprehensive coding.

Coding Guidelines

Inclusion Criteria

Use Q33.1 When
  • Follow ICD
  • CM guidelines for coding congenital malformations, ensuring accurate documentation of associated conditions and symptoms
  • Use additional codes as necessary to capture the full clinical picture

Exclusion Criteria

Do NOT use Q33.1 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

32551CPT Code

Thoracoscopic lobectomy

Clinical Scenario

Used when surgical intervention is required for symptomatic accessory lobe.

Documentation Requirements

Operative report detailing the procedure and indication for surgery.

Specialty Considerations

Pediatric surgical documentation must include growth and development considerations.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of congenital conditions, improving the accuracy of data collection and reimbursement processes for congenital malformations like accessory lobes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of congenital conditions, improving the accuracy of data collection and reimbursement processes for congenital malformations like accessory lobes.

Reimbursement & Billing Impact

reimbursement processes for congenital malformations like accessory lobes.

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 are the common symptoms associated with an accessory lobe of the lung?

Symptoms can vary widely; some patients may be asymptomatic, while others may experience respiratory distress, recurrent infections, or complications related to lung function. It is essential to evaluate each case individually.