Undiagnosed cardiac murmurs

This code signifies the presence of an abnormal heart sound, a murmur, that has been detected but for which the underlying cause has not yet been determined. It indicates that further diagnostic workup is required to identify the etiology of the murmur, such as a structural heart defect or valvular dysfunction.

Use this code when a physician documents the presence of a cardiac murmur without a definitive diagnosis of its origin. This often occurs during initial evaluations, routine physicals, or when a murmur is newly identified and subsequent diagnostic tests (e.g., echocardiogram) are pending or have not yet yielded a conclusive diagnosis.

• Do not use this code once a definitive diagnosis for the murmur's cause has been established.
• Distinguish from codes for specific valvular disorders or congenital heart defects, which should be used when known.
• Ensure documentation clearly states "undiagnosed," "unspecified," or "cause unknown" in relation to the murmur.