ICD-10-CM Alphabetic Index · FY 2026 12 Entries
Fibrillation in the ICD-10-CM Index ICD-10-CM
The main term Fibrillation carries 12 index entries pointing to 9 ICD-10-CM codes. Every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
12
Index Entries
9
Codes Referenced
—
Default Code
F
Letter
12 of 12 shown
ICD-10-CM
Index Entries Under Fibrillation 12 entries · 9 codes
Fibrillation
atrial or auricular (established) I48.91
chronic I48.20
persistent I48.19
paroxysmal I48.0
permanent I48.21
persistent (chronic) (NOS) (other) I48.19
longstanding I48.11
cardiac I49.8
heart I49.8
muscular M62.89
ventricular I49.01
The info icon previews the code's description and billable status; the code link opens its full page with all notations.
Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
