ICD-10 Code I44.2 – Atrioventricular block, complete (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I44.2 – Atrioventricular block, complete
What it is
Complete atrioventricular block is a severe conduction disorder where electrical signals from the atria do not reach the ventricles. The atria and ventricles beat independently, often causing a very slow pulse.
Clinical signs
Typical findings include marked bradycardia, dizziness, syncope, fatigue, or shortness of breath. ECG shows complete AV dissociation; clinical features vary, refer to documentation.
When to use this code
Use I44.2 when the provider documents complete, third-degree, or total AV block. It also fits when the diagnosis is confirmed on ECG or in cardiology notes and the record clearly identifies complete block.
Code this when the condition is the reason for evaluation, monitoring, or admission. If the note only says “AV block” without specifying degree, check documentation.
Do not use for
Do not use this code for first-degree or second-degree AV block, or for nonspecific conduction delay. Check documentation if the record mentions bundle branch block or other rhythm disorders instead.
Coding tip
Look for the exact term “complete,” “third-degree,” or “total” AV block before assigning I44.2.