I44.5 – Left posterior fascicular block
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I44.5
- Code
I44.5(claims format:I445)- Description
- Left posterior fascicular block
- Billable
- Yes – valid for HIPAA-covered transactions
- 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
- Parent codes
- I44
Index terms for I44.5
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in I44
- I44.0 – Atrioventricular block, first degreeBillable
- I44.1 – Atrioventricular block, second degreeBillable
- I44.2 – Atrioventricular block, completeBillable
- I44.3 – Other and unspecified atrioventricular blockHeader
- I44.4 – Left anterior fascicular blockBillable
- I44.6 – Other and unspecified fascicular blockHeader
- I44.7 – Left bundle-branch block, unspecifiedBillable
Frequently asked questions
What is ICD-10 code I44.5?
I44.5 is the ICD-10-CM code for left posterior fascicular block, in the block I30-I5A (Other forms of heart disease).
Is I44.5 a billable code?
Yes. I44.5 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I44.5 belong to?
It belongs to category I44 – Atrioventricular and left bundle-branch block.
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.