I44 – Atrioventricular and left bundle-branch block
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I44
- Code
I44(claims format:I44)- Description
- Atrioventricular and left bundle-branch block
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I30-I5A Other forms of heart disease
Billable codes under I44
I44 is a header code and cannot be used on claims. Choose the most specific code:
- I44.0 – Atrioventricular block, first degreeBillable
- I44.1 – Atrioventricular block, second degreeBillable
- I44.2 – Atrioventricular block, completeBillable
- I44.3 – Other and unspecified atrioventricular blockHeader (more codes below)
- I44.4 – Left anterior fascicular blockBillable
- I44.5 – Left posterior fascicular blockBillable
- I44.6 – Other and unspecified fascicular blockHeader (more codes below)
- I44.7 – Left bundle-branch block, unspecifiedBillable
Frequently asked questions
What is ICD-10 code I44?
I44 is the ICD-10-CM code for atrioventricular and left bundle-branch block, in the block I30-I5A (Other forms of heart disease).
Is I44 a billable code?
No. I44 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.