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v1.0.0
ICD-10 Guide
ICD-10 CodesQ21.11

Q21.11

Billable

Secundum atrial septal defect

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

Code Description

ICD-10 Q21.11 is a billable code used to indicate a diagnosis of secundum atrial septal defect.

Key Diagnostic Point:

Secundum atrial septal defect (ASD) is a common congenital heart defect characterized by a defect in the atrial septum, which separates the left and right atria of the heart. This defect allows oxygen-rich blood from the left atrium to flow into the right atrium, leading to increased blood flow to the right side of the heart and the lungs. Over time, this can result in right atrial and ventricular enlargement, pulmonary hypertension, and heart failure if left untreated. Symptoms may include fatigue, shortness of breath, and palpitations, although many patients remain asymptomatic for years. Diagnosis is typically made through echocardiography, which can visualize the defect and assess its size and hemodynamic significance. Treatment options vary based on the size of the defect and the presence of symptoms, ranging from monitoring to surgical closure or catheter-based interventions. Early detection and management are crucial to prevent long-term complications associated with secundum ASD.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptomatology
  • Need for precise documentation of defect size and hemodynamic impact
  • Differentiation from other types of atrial septal defects
  • Potential for associated congenital anomalies

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to specify the size of the defect
  • Omission of associated congenital anomalies
  • Incorrect coding of related procedures

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Documentation should include detailed clinical assessments, echocardiographic findings, and any interventions performed.

Common Clinical Scenarios

Pediatric patients presenting with unexplained fatigue, recurrent respiratory infections, or failure to thrive may be evaluated for ASD.

Billing Considerations

Consideration of growth and development milestones is essential in pediatric patients with congenital heart defects.

Genetics

Documentation Requirements

Genetic counseling notes should document family history, any syndromic associations, and genetic testing results if applicable.

Common Clinical Scenarios

Patients with ASD may be evaluated for genetic syndromes such as Down syndrome or Turner syndrome, which can have associated congenital heart defects.

Billing Considerations

Awareness of chromosomal abnormalities that may predispose to congenital heart defects is crucial for accurate coding.

Coding Guidelines

Inclusion Criteria

Use Q21.11 When
  • Follow the official ICD
  • CM coding guidelines for congenital malformations, ensuring accurate documentation of the defect's characteristics and any associated conditions

Exclusion Criteria

Do NOT use Q21.11 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

93306CPT Code

Echocardiography, transthoracic, real-time with interpretation and report

Clinical Scenario

Used to evaluate the presence and severity of secundum ASD.

Documentation Requirements

Documentation of indications for the echocardiogram and findings related to the ASD.

Specialty Considerations

Pediatric cardiologists may require additional details on growth and development.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of congenital heart defects, including secundum ASD, 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 congenital heart defects, including secundum ASD, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    American Academy of Pediatrics - Congenital Heart Disease

Coding & Billing References

  • •
    American Academy of Pediatrics - Congenital Heart Disease

Frequently Asked Questions

What is the significance of coding for secundum ASD?

Accurate coding for secundum ASD is crucial for appropriate management and follow-up of patients, as it impacts treatment decisions and potential surgical interventions. It also aids in tracking congenital heart defects for research and quality improvement initiatives.