MCMedicalCodingSoftware
I44.4

I44.4: Left anterior fascicular block

Billable / specific codeICD-10-CMleft

I44.4 is a billable, specific ICD-10-CM code for left anterior fascicular block. It is valid for submission on a claim.

Check I44.4 with the rest of the claim: free scrubber

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

I44.4 is named in 19 Medicare coverage policies: 19 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56476Billing and Coding: Cardiac Radionuclide Imaging
  • A56602Billing and Coding: Cardiac Rhythm Device Evaluation
  • A56625Billing and Coding: Echocardiography
  • A56691Billing and Coding: Cardiac Computed Tomography & Angiography (CCTA)

Alphabetic index entries that lead here

  • Block, blocked›fascicular›anterior
  • Block, blocked›bundle-branch›left›hemiblock›anterior

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under I44

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.