ICD-10 Code I44.39 – Other atrioventricular block (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I44.39 – Other atrioventricular block
What it is
I44.39 identifies an atrioventricular block that does not fit the more specific first-, second-, or third-degree categories. Use it when documentation states another AV block type or an unspecified conduction abnormality at the AV node.
Clinical signs
Clinical features vary; refer to documentation. Patients may have bradycardia, dizziness, syncope, fatigue, or an irregular pulse, and ECG findings should support an AV conduction delay or block.
When to use this code
Use this code when the provider documents “other AV block,” “atypical AV block,” or a conduction disturbance that is not described by a more specific ICD-10-CM code. It is also appropriate when the record clearly supports AV block but does not specify the degree or pattern. Check documentation before assigning it instead of a more precise code.
Do not use for
Do not use I44.39 for first-degree, Mobitz I, Mobitz II, complete, or unspecified atrioventricular block when a more specific code is documented. Do not use it for sinus node disorders or other non-AV conduction problems.
Coding tip
Look for the exact rhythm description in the ECG report and provider note before defaulting to I44.39.