Inappropriate sinus tachycardia, so stated

This code represents a persistent, non-paroxysmal sinus tachycardia that is disproportionate to physiological demand and not caused by another primary condition. It is characterized by an elevated resting heart rate, typically above 100 beats per minute, without an identifiable secondary cause.

Use this code when the physician explicitly documents "inappropriate sinus tachycardia" after ruling out other causes such as fever, anxiety, hyperthyroidism, or medication side effects. Documentation should confirm the persistent nature of the tachycardia and the absence of other underlying conditions explaining the elevated heart rate.

• Ensure documentation clearly states "inappropriate sinus tachycardia" rather than just "sinus tachycardia."
• Do not use this code for sinus tachycardia secondary to another condition; instead, code the underlying cause.
• Review the medical record for any mention of contributing factors that would contraindicate the use of this specific diagnosis.