Atrioventricular septal defect, unsp as to part or complete

This code describes a congenital heart defect characterized by a malformation of the atrial and ventricular septa, along with abnormalities of the atrioventricular valves. It represents a defect where the specific type (partial or complete) has not been documented or determined. This condition allows for abnormal blood flow between the heart chambers.

Use this code when documentation confirms an atrioventricular septal defect but does not specify whether it is partial (e.g., ostium primum atrial septal defect with a cleft mitral valve) or complete (e.g., common atrioventricular canal). This is appropriate for initial diagnoses or when further diagnostic workup is pending.

• Avoid using this code if the documentation clearly specifies a partial (Q21.21) or complete (Q21.22) atrioventricular septal defect.
• Always query the provider for clarification on the type of defect if not specified, to allow for more specific coding.
• This code is often a primary diagnosis for congenital heart disease and may be accompanied by codes for associated conditions or symptoms.