Sick sinus syndrome

This code represents a group of heart rhythm disorders characterized by a malfunction of the heart's natural pacemaker, the sinus node. This dysfunction can lead to a variety of arrhythmias, including bradycardia (slow heart rate), tachycardia (fast heart rate), or alternating slow and fast rhythms. Patients may experience symptoms such as syncope, dizziness, fatigue, or palpitations.

Use this code when documentation clearly indicates a diagnosis of sick sinus syndrome, regardless of the specific manifestation (e.g., sinus bradycardia, sinus arrest, sinoatrial block, or bradycardia-tachycardia syndrome). Supporting documentation should include physician notes detailing the diagnostic workup, such as ECG findings, Holter monitoring results, and the patient's clinical presentation.

• Do not confuse this with other specific arrhythmias if the underlying cause is not identified as sick sinus syndrome.
• If a specific manifestation of sick sinus syndrome is documented (e.g., sinus bradycardia due to sick sinus syndrome), code the sick sinus syndrome first, as it is the underlying condition.
• Ensure the medical record clearly distinguishes sick sinus syndrome from transient sinus node dysfunction caused by medications or other reversible conditions.