ICD-10 Code I44.30 – Unspecified atrioventricular block (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I44.30 – Unspecified atrioventricular block
What it is
I44.30 identifies atrioventricular block when the record does not specify the degree or type. It means electrical conduction between the atria and ventricles is delayed or interrupted, but the documentation is incomplete.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include bradycardia, dizziness, syncope, fatigue, or an irregular pulse, but you should code only when the provider documents atrioventricular block without further detail.
When to use this code
Use I44.30 when the clinician clearly documents atrioventricular block, AV block, or heart block, but does not state whether it is first, second, or third degree. It is also appropriate when available test results confirm block yet the note remains nonspecific. If the record later specifies the type, code the documented degree instead.
Do not use for
Do not use I44.30 when the documentation identifies a specific AV block type, such as first-degree or complete block. Do not use it for other rhythm disorders or nonspecific bradycardia without documented atrioventricular block.
Coding tip
Check the cardiology note and ECG interpretation carefully; if the degree is stated anywhere in the record, code the more specific AV block.