I44 ICD-10-CM Code: Atrioventricular and left bundle-branch block
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
I44Atrioventricular and left bundle-branch block
ICD-10-CM diagnosis code · United States clinical modification
Where I44 sits
- 1
Chapter 9
Diseases of the circulatory system (I00-I99)
- 2
Section
Other forms of heart disease (I30-I5A)
- 3
Category I44
Atrioventricular and left bundle-branch block
- 4
Code I44
Atrioventricular and left bundle-branch block
Codes under I44
I44 is a non-billable category. Choose the child code that best matches the documented diagnosis.
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, unspecifiedNotes for this code
Inclusion terms
No inclusion terms are listed for I44.
Code first
No “code first” instruction is listed for I44.
Use additional code
No “use additional code” instruction is listed for I44.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for I44.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for I44.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code I44 mean?
I44 is the FY 2027 U.S. ICD-10-CM code for “Atrioventricular and left bundle-branch block.”
Is I44 a billable or specific ICD-10-CM code?
No. I44 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is I44 located in ICD-10-CM?
I44 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Other forms of heart disease (I30-I5A) (I30–I5A), under category I44, Atrioventricular and left bundle-branch block.
What coding notes are listed for I44?
No inclusion terms are listed for I44 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.