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ICD-10 Guide
ICD-10 CodesQ42.9

Q42.9

Billable

Congenital absence, atresia and stenosis of large intestine, part unspecified

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

Code Description

ICD-10 Q42.9 is a billable code used to indicate a diagnosis of congenital absence, atresia and stenosis of large intestine, part unspecified.

Key Diagnostic Point:

Congenital absence, atresia, and stenosis of the large intestine refers to a spectrum of malformations that affect the structure and function of the large intestine. These conditions can lead to significant gastrointestinal obstruction and require surgical intervention. Congenital absence may result in a complete lack of the large intestine, while atresia refers to a closure or absence of a normal opening, and stenosis indicates a narrowing of the intestinal lumen. These malformations can occur in isolation or as part of syndromic presentations, often associated with other congenital anomalies such as esophageal atresia, Hirschsprung disease, and imperforate anus. Diagnosis typically involves imaging studies, such as X-rays or ultrasounds, and may require endoscopic evaluation. Management often necessitates surgical correction, and ongoing follow-up is essential to monitor for complications such as bowel obstruction or nutritional deficiencies. The complexity of these conditions underscores the importance of accurate coding to ensure appropriate treatment and resource allocation.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Variability in presentation and severity of congenital malformations
  • Need for detailed surgical documentation and follow-up care
  • Potential for associated anomalies requiring additional codes
  • Differentiation between similar conditions (e.g., atresia vs. stenosis)

Audit Risk Factors

  • Inadequate documentation of associated congenital anomalies
  • Failure to specify the exact nature of the malformation
  • Misclassification of atresia vs. stenosis
  • Lack of clarity in surgical intervention details

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Pediatric documentation should include growth parameters, feeding difficulties, and developmental milestones.

Common Clinical Scenarios

Common scenarios include newborns presenting with abdominal distension or failure to pass meconium, indicating possible congenital malformations.

Billing Considerations

Consideration of the child's age and developmental stage is crucial for accurate coding and treatment planning.

Genetics

Documentation Requirements

Genetic documentation should include family history, genetic testing results, and any syndromic associations.

Common Clinical Scenarios

Scenarios may involve genetic counseling for families with a history of congenital malformations or chromosomal abnormalities.

Billing Considerations

Understanding the genetic basis of congenital conditions can aid in accurate coding and management.

Coding Guidelines

Inclusion Criteria

Use Q42.9 When
  • Official coding guidelines emphasize the need for specificity in documenting congenital conditions, including the use of additional codes for associated anomalies and the importance of capturing the full clinical picture

Exclusion Criteria

Do NOT use Q42.9 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

44180CPT Code

Resection of large intestine

Clinical Scenario

Used in cases of congenital atresia requiring surgical intervention.

Documentation Requirements

Detailed operative report and postoperative follow-up notes.

Specialty Considerations

Pediatric surgical documentation must include growth and developmental assessments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding congenital conditions, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding congenital conditions, 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 is the significance of coding congenital absence, atresia, and stenosis of the large intestine?

Accurate coding of these conditions is crucial for appropriate management and treatment planning, as they can lead to serious complications if not properly addressed. It also ensures that healthcare providers receive appropriate reimbursement for the care provided.