I44
⚠ Non-billable
Atrioventricular and left bundle-branch block
ICD-10-CM · FY2026 · Diseases of the Circulatory System
Code
I44
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Circulatory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code I44?
ICD-10-CM code I44 represents Atrioventricular and left bundle-branch block. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I44 billable?
No. I44 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is I44 in?
I44 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.
Related codes in the I44 category
I44.0
Atrioventricular block, first degree
Billable
I44.1
Atrioventricular block, second degree
Billable
I44.2
Atrioventricular block, complete
Billable
I44.3
Other and unspecified atrioventricular block
Non-billable
I44.4
Left anterior fascicular block
Billable
I44.5
Left posterior fascicular block
Billable
I44.6
Other and unspecified fascicular block
Non-billable
I44.7
Left bundle-branch block, unspecified
Billable
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