I44
⚠ Non-billable (Header)Atrioventricular and left bundle-branch block
Diseases of the circulatory system (I00-I99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for I44
Child Codes (8)
I44.0Atrioventricular block, first degreeI44.1Atrioventricular block, second degreeI44.2Atrioventricular block, completeI44.3Other and unspecified atrioventricular blockI44.4Left anterior fascicular blockI44.5Left posterior fascicular blockI44.6Other and unspecified fascicular blockI44.7Left bundle-branch block, unspecified
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CodeI44
BillableNo — Header code
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes20 note(s)
Child codes8
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)