I44.4
ICD-10BillableLeft anterior fascicular block
Official ICD-10-CM descriptor (FY2026)
Left anterior fascicular block
I44.4 is valid for submission on a claim — CMS flags it as a billable, specific code.
Related codes in I44
- I44.0Atrioventricular block, first degree
- I44.1Atrioventricular block, second degree
- I44.2Atrioventricular block, complete
- I44.3Other and unspecified atrioventricular blockcategory
- I44.5Left posterior fascicular block
- I44.6Other and unspecified fascicular blockcategory
- I44.7Left bundle-branch block, unspecified
Where this code sits
- Parent code
- I44
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.