ICD-10 Code I44.3 – Other and unspecified atrioventricular block (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I44.3 – Other and unspecified atrioventricular block
What it is
This code identifies atrioventricular block that is documented as other or not further specified. It means electrical conduction between the atria and ventricles is delayed or interrupted, but the exact type is not clearly stated.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include bradycardia, dizziness, syncope, fatigue, or an ECG showing AV conduction delay or dropped beats.
When to use this code
Use I44.3 when the provider documents atrioventricular block without naming first-, second-, or third-degree block, or when the record says “other” AV block. It also fits cases where the exact subtype is not available in the note. Code from the documented diagnosis, not from suspicion alone.
Do not use for
Do not use this code if the record clearly identifies a specific AV block type, such as first-degree, Mobitz I, Mobitz II, or complete block. Check documentation for more precise coding.
Coding tip
Always review the ECG interpretation and provider assessment together before choosing I44.3.