I44Header code — not billable
Atrioventricular and left bundle-branch block
- Chapter
- 9. Diseases of the circulatory system
- Category
- I44
- Effective date
- October 1, 2026
Related codes in category I44
I44.0Atrioventricular block, first degreeYesI44.1Atrioventricular block, second degreeYesI44.2Atrioventricular block, completeYesI44.3Other and unspecified atrioventricular blockI44.30Unspecified atrioventricular blockYesI44.39Other atrioventricular blockYesI44.4Left anterior fascicular blockYesI44.5Left posterior fascicular blockYesI44.6Other and unspecified fascicular blockI44.60Unspecified fascicular blockYesI44.69Other fascicular blockYesI44.7Left bundle-branch block, unspecifiedYes
Frequently asked questions
What is ICD-10 code I44?
I44 is an ICD-10-CM diagnosis code for Atrioventricular and left bundle-branch block.
Is I44 a billable code?
No. I44 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is I44 in?
I44 falls under Chapter 9: Diseases of the circulatory system.
When did I44 become effective?
I44 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to I44?
I44 belongs to category I44, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.