I65.9 vs I74
I65.9 (Occlusion and stenosis of unspecified precerebral artery) compared with I74 (Arterial embolism and thrombosis), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. I74 carries an Excludes2 note covering I65.9: “precerebral embolism and thrombosis NOS (I63.0-I63.2, I65.9)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| I65.9Occlusion and stenosis of unspecified precerebral artery | I74Arterial embolism and thrombosis | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Occlusion and stenosis of unspecified precerebral artery is a billable ICD-10-CM diagnosis code (I65.9). | Arterial embolism and thrombosis is a non-billable ICD-10-CM category code (I74). |
| Includes | embolism of precerebral artery narrowing of precerebral artery obstruction (complete) (partial) of precerebral artery thrombosis of precerebral artery | embolic infarction embolic occlusion thrombotic infarction thrombotic occlusion |
| Use additional code | code to identify presence of: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) | — |
| Code first | — | embolism and thrombosis complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2) embolism and thrombosis complicating pregnancy, childbirth and the puerperium (O88.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources