ICD-10 Code I45.10 – Unspecified right bundle-branch block (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I45.10 – Unspecified right bundle-branch block
What it is
I45.10 identifies a right bundle-branch block when the documentation does not specify whether it is complete or incomplete. It indicates delayed or blocked electrical conduction through the right bundle branch on ECG.
Clinical signs
Clinical features vary; refer to documentation. This diagnosis is usually supported by electrocardiographic findings consistent with right bundle-branch block, often noted incidentally during cardiac evaluation.
When to use this code
Use this code when the provider documents right bundle-branch block but does not state complete or incomplete. It also fits cases where the ECG report confirms a right bundle-branch block and the chart lacks further detail. If the record specifies a more exact type, code that instead.
Do not use for
Do not use this code for left bundle-branch block, bifascicular block, or other conduction disorders. If the documentation identifies a specific subtype of right bundle-branch block, check documentation and code the more precise option.
Coding tip
Review the ECG wording carefully; unspecified codes are appropriate only when the record truly leaves the type of right bundle-branch block unclear.