I44.60 (Unspecified fascicular block) compared with I45.0 (Right fascicular block), from the official CMS tabular data. I44.60 and I45.0 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. I44.60 and I45.0 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| I44.60Unspecified fascicular block | I45.0Right fascicular block | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Unspecified fascicular block is a billable ICD-10-CM diagnosis code (I44.60). | Right fascicular block is a billable ICD-10-CM diagnosis code (I45.0). |
| Includes | Left bundle-branch hemiblock NOS | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources