ICD-10-CM category
I44 Atrioventricular and left bundle-branch block
I44 is a category, not a billable code. Report one of the 10 complete codes below.
Codes in I44
- I44.0Atrioventricular block, first degree
- I44.1Atrioventricular block, second degree
- I44.2Atrioventricular block, complete
- I44.30Unspecified atrioventricular block
- I44.39Other atrioventricular block
- I44.4Left anterior fascicular block
- I44.5Left posterior fascicular block
- I44.60Unspecified fascicular block
- I44.69Other fascicular block
- I44.7Left bundle-branch block, unspecified
Outside the US? I44 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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